what cam?
06-09-2007, 03:13 PM
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Car: 1991 Camaro RS
Engine: 350 TPI
Transmission: 700R4 Auto
Axle/Gears: 1 legger 2.xx(needs upgrade)
what cam?
i know its early to think about winter but.. thats when i want to do some more work to the engine!!!! i have a nearly stock 350/700r4 combo... extra's on it consist of holley throttle body and slp runners. 700r4 has a shift kit for sure and possibly a high rev torque converter. Engine/tranny came as a combo deal with 8k on a rebuild =D. I have a high flow cat and a flowmaster exhaust 3". Over this winter i would like to install a mild cam, I have a guy who can do the work with me so thats not a big deal. What I dont know is anything about cam's and what else I need to change along with it. I like the sound that cam's give off. I dont plan on changing the heads until next year(dont have the money to) One thing at a time =D and the cam is what I want to do next. Any sugguestions? on a cam and what else needs to be changed along with it?
06-09-2007, 11:07 PM
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Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
Re: what cam?
How many miles on the engine now.For a basicaly stock tpi I would keep the duration fairly low,and i think they like an lsa around 114 or so.Your going to need a custom chip especially if its map.Definatly get new springs,the stock ones where weak when they where new.Roller rockers would also be good but on stock heads they may need a little work.I know several people,me included are running some of the LT1 and 4 style cams.I paid $100.00 for mine new.On a stock engine I believe it was lik a 30 lb/ft and around 15hp.If your mileage is high would be careful adding a bunch of new parts on an engine that worns in on original parts.Just seems lke a good way to waste money and tear something up to me.I`m happy with the cam.It doesnt make my car a race car but its a respectable lil cam for the money.Great idle cause its a production cam.If you go too high wth lift you may need some head work to support that as well.Hope that helps some,maybe someone else will chime in and offer you some help.It really depends on how much money you want to spend.search and check out peoples sigs for the cam they`re running with tpi,and how they like it.TPIS makes some pretty good ones and many others.
06-09-2007, 11:49 PM
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Car: 1991 Camaro RS
Engine: 350 TPI
Transmission: 700R4 Auto
Axle/Gears: 1 legger 2.xx(needs upgrade)
Re: what cam?
it has about 13,000 miles on it, its a 1991 SD harness + cpu, i have a laptop and chips to toy around with... and tuning programs, just need to learn how to use them! and im not looking for a crazy "race" cam or anything like that, just something that will give the cam sound and be a little more respectable... i would def change the springs and i could change the roller rockers to if thats needed, would like to wait to change heads until next year when i have the money for them... 100$ is def reasonable to spend.. i have probably around 400$ i would like to spend total on a cam setup.... dont know how much other cam's are or springs or rockers =D thats why im asking for input and which one to get. again im not looking for a crazy raceing cam, just something mild with the sound thats respectable and whatever needs to be changed along with it.
thanks for your input!!! where did you get your cam? and what springs/rockers would be good to get with it?
thanks for your input!!! where did you get your cam? and what springs/rockers would be good to get with it?
06-10-2007, 01:22 PM
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Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
Re: what cam?
If you just had it rebuilt it should be fine,but on sd you are going to need to get a tune or learn to tune to get it running right.unfortunatly the cam I`m running will not give you the camed sound you are looking for.for that matter I believe your going to need one with some high duration which does not mix well with a tpi.Check out the tech articles on the home page and click on all about camshafts.I bought my heads and cam at the same time.Had the LT4 springs and retainers already set up on the heads so I went with the LT4 cam and 1.6 rockers to get some extra lift.You may need some minor head work for the rockers.My cam was cheap cause its a production cam.Youll probably eat up $400 quick going with a new crane,comp,or tpis and buying the supporting mods.If you decide togo with roller rockers you could have the head work done and some mild porting and you might get what you want out of the stock heads for now at a minimal price compared to new heads.Also in the tech articles read "what everyone should know"the parts about intakes and cams will tell you much about what you need to know.You have aftermarket TB and runners,that may bump up your peak rpm a little.But wont be a huge differance.
Last edited by Shadygrady; 06-10-2007 at 01:50 PM.
06-10-2007, 07:35 PM
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Car: 1991 Camaro RS
Engine: 350 TPI
Transmission: 700R4 Auto
Axle/Gears: 1 legger 2.xx(needs upgrade)
Re: what cam?
how much did the whole setup run you? for the heads springs etc?
06-10-2007, 07:54 PM
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Car: 1991 Camaro RS
Engine: 350 TPI
Transmission: 700R4 Auto
Axle/Gears: 1 legger 2.xx(needs upgrade)
Re: what cam?
k i read that tech article and what i kinda got out of it is that i should get one of the "tpi" cam's right?
TPIS Cams
Model Number .05" Duration 1.5:1 Lift 1.6:1 Lift Lobe Sep. Notes
700-136 212/226 .483/.520 .515/.554 112deg ZZ9 Cam
700-137 210/218 .492/.492 .525/.525 112deg None
700-150 218/219 .415/.433 .443/.462 108deg Super Profile L98
something to that matter... this is kinda confuzing, theres a lot to learn
TPIS Cams
Model Number .05" Duration 1.5:1 Lift 1.6:1 Lift Lobe Sep. Notes
700-136 212/226 .483/.520 .515/.554 112deg ZZ9 Cam
700-137 210/218 .492/.492 .525/.525 112deg None
700-150 218/219 .415/.433 .443/.462 108deg Super Profile L98
something to that matter... this is kinda confuzing, theres a lot to learn
06-10-2007, 11:29 PM
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Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
Re: what cam?
Well I believe they`re good and they`re made for the tpi systems more or less,and yes there is a lot to learn.I am not a mechanic so I would definatly talk to some companies on the phone and hopefully someone else with more exp. than I will chime in.My heads and cam didnt come together but I bought them both from jim pace GM performance parts.The cam was cheap but the heads were not.The heads are alluminum zz4 same as the vette/camaro 113 heads.The were set up ready to bolt on with the better springs and retainers.Ran me right at a grand plus shipping for the heads.Did you read the what everyone should know article further down the page?I suggest you do a lot of research and be sure you`re getting whats best for you so you dont waste your money.Read the articles again,I had to read them several times and still have to check back in on them all the time.Make sure your heads and cam are closely matched.Also what heads do you have now?If there the stock 350 tpi heads(I forget the #)083 I think I believe with some mild porting they can flow pretty good for a mild street build.AND cost much less.Good luck and have fun.If you get any good at tuneing let me know I think I could stand a better tune.
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06-12-2007, 04:59 PM
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Car: 1991 Camaro RS
Engine: 350 TPI
Transmission: 700R4 Auto
Axle/Gears: 1 legger 2.xx(needs upgrade)
Re: what cam?
yes they are stock heads as far as i know. and ill keep doing my research! i will most likly get my heads ported and change the cam after i do my homework. im not looking for a drag car or anything just a weekend driver that is respectable... not something thats omg crazy, if you understand what i mean =D
i dont see that anywhere in the tech article... maybe im looking in the wrong place?
Did you read the what everyone should know article further down the page?
06-12-2007, 07:50 PM
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Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
Re: what cam?
That article is further down under miacelanious(or however you spell it) modifications I think.It is a little easy to overlook.
06-23-2007, 08:14 PM
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Car: 1991 Camaro RS
Engine: 350 TPI
Transmission: 700R4 Auto
Axle/Gears: 1 legger 2.xx(needs upgrade)
Re: what cam?
after more reasearch i have figured out it would be best to change the cam and get heads to match... so im back here trying to see someones sugguestions! i would like to purchase a decent setup for heads/cam and whatever else is needed along with the change(springs) and rockers if needed. What im looking for is a more respectable sound and the little bit more pep. I dont personally see the need in alum heads because its not like im building a drag race car so no need to make it "lighter".
Engine is basicly stock
Aftermarket holley throttle body and slp runners.
currently has the stock manifolds, y pipe, to a 3" catback flowmaster ehxaust.
i may be picking up a set of edelbrock airtube headers not sure yet.. looking into it
any and all sugguestions would be greatly appreciated! and info on anything =D i have also read that a lot of people like the lt4 cam
Engine is basicly stock
Aftermarket holley throttle body and slp runners.
currently has the stock manifolds, y pipe, to a 3" catback flowmaster ehxaust.
i may be picking up a set of edelbrock airtube headers not sure yet.. looking into it
any and all sugguestions would be greatly appreciated! and info on anything =D i have also read that a lot of people like the lt4 cam
06-23-2007, 10:29 PM
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Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
Re: what cam?
well,I dont think alot of people like it but there are some people useing it.Most of them are useing the hot cam instead of the production cam.Alluminum heads are not needed,just something I wanted to do.Check out World products.They make affordable performance cast Iron heads and more.Alot of people do use those.Call a cam company.They could suggest a cam for you,and the supporting mods needed.
06-27-2007, 03:08 PM
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Car: 1991 Camaro RS
Engine: 350 TPI
Transmission: 700R4 Auto
Axle/Gears: 1 legger 2.xx(needs upgrade)
Re: what cam?
Well i figured Edelbrock would have something for me... and they dont.. this is what he said
We do not have a cam that will work with your TPI, especially if it is a
roller cam engine. Our #60859 cylinder heads will work nicely and gain
approximately 20HP over your current combination. Thanks.
Ray Garcia
Technical Department
Edelbrock Corporation
We do not have a cam that will work with your TPI, especially if it is a
roller cam engine. Our #60859 cylinder heads will work nicely and gain
approximately 20HP over your current combination. Thanks.
Ray Garcia
Technical Department
Edelbrock Corporation
06-27-2007, 04:48 PM
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Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
Re: what cam?
Try tpis or gmpp for a cam.Tpis would have one for you.WIth a mild cam do some mild porting to your heads or check out world products iron vortecs.WORLD HAS GOOD PRICES.TPIS IS PRETTY EXPENSIVE BUT THEY HAVE CAMS THAT ARE MADE FOR A TPI.
Last edited by Shadygrady; 06-27-2007 at 04:51 PM.
06-27-2007, 05:55 PM
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Car: 89 ws6
Engine: 355 afr195, hsr,gmpp cam, hs rr,
Transmission: t-5
Axle/Gears: 3.08
Re: what cam?
Shady madea good suggestion you can always consult an engine builder or manufactuer on what cam to use. I agree too much duration is not a great idea although switchin g to an aftermarket intake in the future you can definitely use the duration. I would suggest keeping the lift under .500 lift because stock springs are only good to .500. My cam is a gmpp cam .480/.480 lift 235/ 235 dur. 116 lobe sep. works well for me even when it had stock tpi intake. Really shined with the stealth ram install.
06-27-2007, 09:17 PM
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Car: 1991 Camaro RS
Engine: 350 TPI
Transmission: 700R4 Auto
Axle/Gears: 1 legger 2.xx(needs upgrade)
Re: what cam?
how does the cam idle? what exhaust do you have? is it a good idle with a little bit of the loopy sound? and if i have to i can upgrade to non stock springs and whatever it takes but if i can do without that would be good =D
----------
and shady tpi u mean http://www.tpiparts.net/ ?? and whats gmpp?(WORLD?) site?
This is basicly what im saying to these people when i email/call them.
Hello,
I have a nearly Stock 350TPI 5.7L Engine from an 87 Camaro that i converted to the 91 Speed Density. Its in my 1991 Camaro RS. Aftermarket parts i have on it are Holley Throttle body, and SLP Runners. Im running stock manifolds to a 3" catback exhaust/flowmaster muffler. The engine has 10k miles on a rebuild and so does the transmission. Im looking into upgrading the cam. Some people say i should match heads to go with it, change the springs/rockers, timing chain/gears. My question to you is what do you recommend for a cam for me? And what do I need to change to accommodate the cam? Im not looking for a hot cam, just something mild. I want the more respectable idle(somewhat loopy) and the little bit of power it adds along with it.
Thanks for your time
Thomas
am i missing anything?
----------
and shady tpi u mean http://www.tpiparts.net/ ?? and whats gmpp?(WORLD?) site?
This is basicly what im saying to these people when i email/call them.
Hello,
I have a nearly Stock 350TPI 5.7L Engine from an 87 Camaro that i converted to the 91 Speed Density. Its in my 1991 Camaro RS. Aftermarket parts i have on it are Holley Throttle body, and SLP Runners. Im running stock manifolds to a 3" catback exhaust/flowmaster muffler. The engine has 10k miles on a rebuild and so does the transmission. Im looking into upgrading the cam. Some people say i should match heads to go with it, change the springs/rockers, timing chain/gears. My question to you is what do you recommend for a cam for me? And what do I need to change to accommodate the cam? Im not looking for a hot cam, just something mild. I want the more respectable idle(somewhat loopy) and the little bit of power it adds along with it.
Thanks for your time
Thomas
am i missing anything?
Last edited by tourville; 06-27-2007 at 09:27 PM. Reason: Automerged Doublepost
06-27-2007, 09:58 PM
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Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
Re: what cam?
I think I`ve said this before but loppry idle and tpi dont mix. Sorry I wasnt more clear TPIS=tuned port injection specialist,www.tpis.com,I think they`ll send you a free catalog and offer pretty good tech phone support.GMPP=GENERAL MOTERS PERFORMANCE PARTS or I use jim pace performance parts at paceperformanceparts.com.World products can be bought through them or jegs or summit i`m pretty sure.But seriously,if your heads are ingood shape I would just have some port work done,upgrade springs and retainers,get roller rockers and you`ll have a pretty good set of heads for a mild street engine at a lesser price unless you want that 20 extra hp or so that vortecs will give you.Then you`ll have to buy a new intake so they`ll fit.If you got the money go ahead and upgrade and get some new heads.You said you had 10,000 or so on rebuild.What did they do to the heads?do you know what all was done?
and shady tpi u mean http://www.tpiparts.net/ ?? and whats gmpp?(WORLD?) site?
06-28-2007, 10:31 AM
#17
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Car: 89 ws6
Engine: 355 afr195, hsr,gmpp cam, hs rr,
Transmission: t-5
Axle/Gears: 3.08
Re: what cam?
Yes I have full exhaust on my car. 1 3/4 slp headers, 3in cat, 3 in force II flowmaster cat back. It sounds tough at idle but not the sound you are thinking of from big cams with tightier lobe seperations like 110 or 108. If you have your heart set on the sound, you can always make a vaccum leak haha. My friend does have the zz4 cam in his car and the idle is more noticeablt than my car so that might be an option for you.
06-28-2007, 06:48 PM
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Car: 1991 Camaro RS
Engine: 350 TPI
Transmission: 700R4 Auto
Axle/Gears: 1 legger 2.xx(needs upgrade)
Re: what cam?
I finally got a few responses back from email! Very useful. Here they are. And whats the easiest way to know if I have a roller cam? or a non roller cam?
If you have a roller cam ( 87 and later blocks use a roller block) I would suggest our ZZ9 camshaft is you'd like to keep your stock heads. You will have to change valve springs using our 700-132 spring set. The zz9 has 212/226 .483/.520 112 LSA. If you plan on changing cylinder heads, you may want to use our ZZ409 cam. This cam has a larger intake lobe than the ZZ9. The specs are 226/226 duration and .520/.520 lift with 112 LSA. IF you have to pass an emissions test, I would recommend using the ZZ9. It is a nice upgrade from the factory cam, offers good driveability, clean emissions. If you do want to change cylinder heads, we carry Dart, RHS and AFR. Let me know if you have any further questions.
Jim
TPIS
952-448-6021
Jim
TPIS
952-448-6021
Hi, I'm assuming this is primarily a street driven car, correct? I'd
suggest something along the lines of Comp Cams 08-500-8. It has 206/212
degrees of duration @.050, and .480/.488" of lift, with a 112 LSA. It
will yield a nice HP gain, have plenty of vacuum for power brakes, and
can be run on a stock prom (although prom tuning will show HP gains
also).
A mild cam will not require higher flowing heads, but depending on the
cam you go with, you may need some head work. For example, depending on
the cam's lift figures, you may need to have the valve guides machined
down to avoid having the valve retainers hitting the valve guide. This
is generally a problem around .480 lift or higher, but varies on your
heads. Some folks have reported to run into this problem as low as .440
lift or so.
You should contact the cam manufacturer once you pick out a cam and ask
what springs are recommended. The stock valve springs were barely
adequate for the factory cam when they were new, and will definitely not
be adequate even for the stock cam now.
Keep in mind that what is mentioned above is the right way to do things.
Tons of people do none of the above and just swap cams, and apparently
don't run into problems too often. However, I wouldn't recommend
overlooking the valve guide clearance or spring selection.
Thanks,
TPI PARTS
www.tpiparts.net
suggest something along the lines of Comp Cams 08-500-8. It has 206/212
degrees of duration @.050, and .480/.488" of lift, with a 112 LSA. It
will yield a nice HP gain, have plenty of vacuum for power brakes, and
can be run on a stock prom (although prom tuning will show HP gains
also).
A mild cam will not require higher flowing heads, but depending on the
cam you go with, you may need some head work. For example, depending on
the cam's lift figures, you may need to have the valve guides machined
down to avoid having the valve retainers hitting the valve guide. This
is generally a problem around .480 lift or higher, but varies on your
heads. Some folks have reported to run into this problem as low as .440
lift or so.
You should contact the cam manufacturer once you pick out a cam and ask
what springs are recommended. The stock valve springs were barely
adequate for the factory cam when they were new, and will definitely not
be adequate even for the stock cam now.
Keep in mind that what is mentioned above is the right way to do things.
Tons of people do none of the above and just swap cams, and apparently
don't run into problems too often. However, I wouldn't recommend
overlooking the valve guide clearance or spring selection.
Thanks,
TPI PARTS
www.tpiparts.net
06-28-2007, 07:00 PM
#19
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Car: 89 ws6
Engine: 355 afr195, hsr,gmpp cam, hs rr,
Transmission: t-5
Axle/Gears: 3.08
Re: what cam?
Ask and you shall receive. The cams under .500 lift will be the best suited if you keep stock heads on there. Glad to see you got thorough replies.
06-28-2007, 07:32 PM
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Car: 1991 Camaro RS
Engine: 350 TPI
Transmission: 700R4 Auto
Axle/Gears: 1 legger 2.xx(needs upgrade)
Re: what cam?
well i reply'd to tpi parts. What i asked is the cam he has recommended me, who do i have to ask about haveing the valve guides machined, and where can i have it done? And the fact that yes i want to do this the "right" and "safe" way, not overlooking anything! Still have a lot of time to research and pick out whats best for me
also another reply from just a random person...
also another reply from just a random person...
i'd look at getting a set of D113 heads from www.corvetteforum.com or www.corvetteactioncenter.com you can pick them up used for about 300 bucks or built for about 500 or so. get new springs and push rods with roller rockers. the heads you have a junk and wont flow right. and go with the zz9 cam it works good for a 350.
Last edited by tourville; 06-28-2007 at 08:33 PM.
06-28-2007, 10:08 PM
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Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
Re: what cam?
that comp cam is almost identical to what I`m running.It`s slightly more duration and lift.I mean slightly.The d113 heads are what I`m running.The heads are used on the zz4 engine and support 350 hp.My cam made 330 hp in the lt4 engine,I know it can support more.It idles great and still gets over 20 mpg.Runs decent times with everything else stock with crappy headers and could use a better tune.What do you expect out of your engine.I wanted 13`s and I got them.Will have better times with more time,money and mods.it took me a couple years to get everything I needed.It all depends on what you want and how much money you got to spend.I bought all my stuff new just because thats what I wanted to do.You can get good deals on some decent to quality used parts.
are you planning on keeping your tpi for good?
are you planning on keeping your tpi for good?
06-29-2007, 04:27 AM
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Car: 1991 Camaro RS
Engine: 350 TPI
Transmission: 700R4 Auto
Axle/Gears: 1 legger 2.xx(needs upgrade)
Re: what cam?
yes i plan on keeping the tpi for good! at least thats the plan now, spent to much to get what i paid and i cant seem to sell the car even if i really wanted to.. dont have it in me to. personally i would just like to change the cam for now, maybe upgrade heads next year.. i have been reading a lot if i upgrade the heads i have to upgrade the intake cause it wont bold on? which cam is better the zz9 cam or the one tpis sugguested? Comp Cams 08-500-8. It has 206/212 degrees of duration @.050, and .480/.488" of lift, with a 112 LSA. Either way suposidly i wouldnt have to change my heads and those could be done later on... for the more hp gain just might have to get some machine work done and change springs!.
so far i think im feeling most comfortable with the tpi's cause they gave me the best info and most help
so far i think im feeling most comfortable with the tpi's cause they gave me the best info and most help
06-29-2007, 07:58 AM
#23
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Car: 89 ws6
Engine: 355 afr195, hsr,gmpp cam, hs rr,
Transmission: t-5
Axle/Gears: 3.08
Re: what cam?
I think it will be all in your personal preference. I like the Crane cam specs but the other ones have good specs as well. Just rememebr the ones with a tighter lobe seperation will give you more of the desired idle. like 112.
06-29-2007, 09:40 PM
#24
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Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
Re: what cam?
Staying with the tpi I vote for the comp 206/212,.480/.488
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