1bad91Z

iTrader: (1)

How many of you guys have these heads? I have a set waiting to be bolted on to my new combo! I have the CNC ported dual valve spring (up to .600 lift) heads. The cam I have is SLP hyd. roller .536/.544 with 1.6 rockers and 224/232 duration @ .50, 280/288 seat to seat duration, 112 LSA. 10.5 to 1 compression forged bottom end. With a TPIS big mouth base, SLP runners, ported plenum, 58mm throttle body, 26lb injectors, SLP 1 3/4 headers, I'm expecting 450hp/500ft lbs. Would you guys have used different heads? I havent bolted them on yet.

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1991 Z-28 350 TPI, 700r4 with B&M shiftkit, 2400 stall, B&M Console Megashifter, 4th gen power seats, MSD6A, Blaster2 Coil, Holley 58mm TB, Ram-air, MSD 8.5 super conductor wires, Flowmaster catback, Crane rollers, march pulleys, and all free mods. (Currently in body shop getting fresh paint!!) I miss her! =(

1bad91Z

iTrader: (1)

oh yea, I read somewhere on this board that TFS 23's flow 245cfm at .500 lift. That is incorrect. They flow 251 @ .500 and 255 at .550. This is without the CNC port package.

GregWestphal

iTrader: (1)

I have them and have been happy with them so far. I bought the CNC-ported version but with the larger single springs (didn't offer the dual springs in the '87-95 style when I bought them). I'm running an 11.1 to 1 compression 355 with an LT4 HOT cam, ported Edelbrock base, and stock runners (until I finish porting my SLP runners), along with 24# SVO injectors and Hooker SuperComp shorty headers. I made 257 rwph and 347 lb-ft of torque recently, expecting to hit 300 hp and 375 lb-ft of torque at the rear wheels after the SLP runners (and a 58mm TB) are installed. That equates to 375 hp and 470 torque at the engine assuming 20% drivetrain loss with an automatic.

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Greg Westphal
'87 IROC 355TPI/A4

1bad91Z

iTrader: (1)

Hey Greg, do you have a custom tuned prom? If so, who burned the chip? With a little more Cam and some Head porting, you should be well over 300-340hp at the back tires!! A yank converter would help you put ALOT more to the back tires too!

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1991 Z-28 350 TPI, 700r4 with B&M shiftkit, 2400 stall, B&M Console Megashifter, 4th gen power seats, MSD6A, Blaster2 Coil, Holley 58mm TB, Ram-air, MSD 8.5 super conductor wires, Flowmaster catback, Crane rollers, march pulleys, and all free mods. (Currently in body shop getting fresh paint!!) I miss her! =(

GregWestphal

iTrader: (1)

I burn my own chips. Since I just installed the engine this summer, there's no way I'm going with a bigger cam or pulling the heads. The engine doesn't like idling at less than 750 rpm in Drive, and this is still my all-weather (except for snow) daily-driver. I already have a Precision Industries 12" high-stall converter that stalls at 2600 rpm, but I may spring for a Vigilante next year if I think it's worth it (can't afford one this year). Oh, my dyno graph can be seen at:

http://www.mafb.org/mafb/registry/detail.cfm?id=21

under the Photos section.

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Greg Westphal
'87 IROC 355TPI/A4

1bad91Z

iTrader: (1)

Greg, do you think to can pick up 40hp at the rear with a just runners and a 58mm TB?

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1991 Z-28 350 TPI, 700r4 with B&M shiftkit, 2400 stall, B&M Console Megashifter, 4th gen power seats, MSD6A, Blaster2 Coil, Holley 58mm TB, Ram-air, MSD 8.5 super conductor wires, Flowmaster catback, Crane rollers, march pulleys, and all free mods. (Currently in body shop getting fresh paint!!) I miss her! =(

GregWestphal

iTrader: (1)

That's what I'm hoping for.

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Greg Westphal
'87 IROC 355TPI/A4

Acceld Z

Don't they only come with CNC combustion chambers? I was not aware that you could have the ports CNC'd. I looked into getting a set of these last year because they seem to be a great deal.

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89GTA-The Driver
92Z28-The Lawn Ornament

"Sunday Money"

GregWestphal

iTrader: (1)

Right, just the comb. chambers are CNC-ported, not the intake or exhaust ports. They seem like a great deal to me. I'll find out even more once I get the runners and TB installed and get the IROC dyno'd again.

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Greg Westphal
'87 IROC 355TPI/A4

1bad91Z

iTrader: (1)

forget all of the above!! go with GM Fastburn heads!!! You'll make alot more power, however you'll also need to buy the vortec tpi base.

Acceld Z

I'd take the Edelbrock E-Tecs over the Fastburns

MikeH

iTrader: (10)

The trickflows out flow the fast burn heads out of the box.

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90 IROC
SuperRamed 406
Trickflow 23* heads

craiger

If you are planning on spending the cash for the trickflows, I can hook you up with a set of AFR's for only a few $ more. If your are interested, email me.

Dan87IROC-Z

I think that the TFs are only out-flowed by the AFRs, assuming that the chambers and ports are all the same sizes, so go with either the Trick Flows or the AFRs. I wouldn't go with GM heads if you have to change the base, thats just more time and money wasted!

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End with 2.77:1 Gears.

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Accel High Flow TPI Baseplate, Edelbrock TES 1 5/8" Headers, Catco 3" High-Flow Catalytic Converter, Hooker 3" Aerochamber Cat-Back System, Transgo Shift Kit, Performance Resource Chip, Accel Ignition, K&N Filters, Jet TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET: 14.32 @ 97.7mph
(corrected for elevation)

CeeDubYa

Trickflows are designed to be ported to meet your combo's expectation. Which is why the majority of their packages come with CNC'd chambers only. With TFS you also will have a much better quality valvetrain. You lose a small amount of advertised air flow, but as a rule they will flow more than advertised when on a proper flowbench. You save money too, so there one more advantage.

grumpyvette

IVE used SEVERAL sets of trickflow heads in personal engines built FOR my corvettes and will CONTINUE to use them,
TRICKFLOW & BRODIX are some of the better values in cylinder heads, and quality machine work.
btw some minor port and bowl work really wakes the head flow up

intex1982

iTrader: (2)

how much horsepower gain tfs vs stock head on a 9.5 to 1 cr motor and perform rpm intake and .480 cam and holley 600

grumpyvette

the TOTAL combo would need to be looked at but 40-60hp is a reasonable range....keep in mind a good cam and higher compression, a low restriction exhaust ETC. will really allow the heads to perform & flow to full potential, once all thats done stock heads could easily cost you 70-90hp compared to the trickflows

intex1982

iTrader: (2)

195 62cc 2.02 1.60 trick flow heads what i have put on there just dont feel that great! more info on the car 84 camaro auto 350 th shift kit 2200 stall 2.93 rear gear posi the motor has headmen headers and 3in ext flowmasters and u have any idea what this combo should run in the 1/4mile if u need more info ask

grumpyvette

[QUOTE= auto 350 th shift kit 2200 stall 2.93 rear gear [/QUOTE]


your main problem is strikingly obvious, with that stall and REAR GEAR RATIO, your spending a large percentage of your time in the 1500rpm-4500rpm band where high flow heads potential flow rates are nearly useless.
drop a 3.73:1 rear gear and 2800rpm-3000rpm stall converter in that car and the differance will SHOCK AND AMAZE YOU!
look the increased head flow potentials only USED above about 4000rpm, under that the stock heads can supply the engines needs, its hardly the cylinderheads design or the engines fault if the cam won,t open the valves to take full advantage of the designed flow rates or if your not operating the engine in an rpm band where those higher flow rates can produce increased power, again,drop a 3.73:1 rear gear and 2800rpm-3000rpm stall converter in that car and the differance will SHOCK AND AMAZE YOU!

grumpyvette

heres a 350 that makes 517hp




heres a 383 that only makes 503 hp! (on the left)


now figure your cars gearing and trans keep you in the 3500rpm-6000rpm range at all times,NOW in reality your in the 1500rpm-5500rpm band and spend most of your time below 4000rpm) with that 2.9 rear gear ratio is there any doubt as to which engine in the above examples,will push the car faster? the 350 has more PEAK POWER POTENTIAL, but youll never get into the that engines power band with the camaros current rear gearing with and your cars gearing, trans shift points and stall speed makes it so it would prove useless., just like the your cars gearing, trans shift points and stall speed makes the potential head flow all but unused/useless

intex1982

iTrader: (2)

will stall and gears get me in to the 12s?

grumpyvette

theres too many untouched areas for me to make a reasonable guess...(TRACTION,DRIVING SKILL etc.) but I can tell you you won,t be sorry! AND youll sure notice the differance in accelleration once both are done/installed, AND WONDER WHY IT TOOK SO LONG FOR YOU TO DO THE MODS

intex1982

iTrader: (2)

where can i get a good set of gears at and what size is 2.93 is it 7.5

Camaroz29

iTrader: (3)

Talk about bringing a thread back from the dead, lol!

T/A_SXracer

Just a ? has anyone here ran RHS heads. these are what i put on my new setup, and several of my racer friends run them, and i got a heck of a deal. They are designed like (at least these i have) a gm vortec head, with the raised runners and bigger valves. 2.02 on the intake and 1.90 exhaust. I picked 'em up for 700 fully assembled with valves, springs, retainers, studs and guide plates. after 150 for a pocket port i only have 850 in 'em....still cheaper than most other options i've looked at, or seen mentioned here....i'll see if i can get some flow numbers for you.

irocnroll89

iTrader: (4)

Hey T/A did you ever get the flow numbers. i have a local speed shop here in georgia that is singing the praises. I am looking at 950.00 for complete castings, w/t lift good to .600
Any thoughts?
shawn

T/A_SXracer

Wow. i completely forgot about this. Yeah actually i did find them......once. Let me try again, i may call the guy who did mine and see if he benched 'em when he was done. but i've driven my car now, and i dont have a lot to compare to, but the thing runs awsome.

T/A_SXracer

Here's the link to their website....they list the numbers that they clame....theres a chart for each runner size. http://www.racingheadservice.com/Inf...hevy-Heads.asp