TierAngst

http://www.lingenfelter.com/Merchant...Category_Code=


Specs are as follows with 1.5 rockers.
213/219 .462/.471 112 1600-5200

Trying to overcome the lack of egr with a decent cam and stock heads, would this be what I'm looking for? If this is a good choice what springs should I get to match it?

brodyscamaro

i personally think that that cam is too small...

TierAngst

And your suggestion would be...?

brodyscamaro

****, there are a billion choices. And Im so gone I can barely focus on the screen - I'll reply tomorrow..

TierAngst

Stock LT4 cam possibly?

dimented24x7

iTrader: (2)

If i remember custom cruiser is another word for land yacht. Unless your going to mod the trans and swap gears, a larger cam will do more harm then good in such a heavy car.

What is your ultimate goal with your setup?

TierAngst

Ultimate goal:
383 forged internals (8.2-8.5:1)
Roots blower (single carb setup)
Holley 4bbl tbi system

Trans good for at least 600hp
2400-2600 Stall TC

3.42 gears and posi of course


I think most of that doesn't apply here because it will be about a year and a half before I get the blown stroker so I'm looking for a bit of power to hold me over until then. I will be doing my ultimate goal in reverse order of what I posted so it'll all stand up to the motor. I'd say gears will be in next spring, TC shortly after.

dimented24x7

iTrader: (2)

That cam would probably be ok. Might be a little more then you want with stock heads, maybe something with around 206 or so of duration at the intake. The tbi heads are going to be the limiting factor as they barely flow at all in stock form. None the less, it would be good practice to tune it with your current ecm before putting in the 383 so you have some experience with how tuning with a computer works. The presentation will be different with the holley ecu but the same basic principals will apply.

TierAngst

Well right now I'm looking to add 20hp and 3mpg (what I lost removing egr) with a cam swap. I know the stock heads don't flow all that great without being ported but will it make something like an LT4 cam or the lingenfelter cam completely worthless to put in or would I meet my goal of 20hp? Pretty much as long as it doesn't slow the car down with the stock gears and TC I'll be happy, since those will be replaced soon enough.

Dewey316

Get a Lunati 206/216 cam. That is basicly the same cam I am running in my car, with headers, and an intake, with that cam, it is a good 70hp increase over stock.

--John

Fast355

iTrader: (2)

I have a Crane HR276 in my closet ready for mine!

I have already put one in my little brothers 1995 Tahoe 350 TBI, with the nearly STOCK swirl ports (CUT for LIFT ONLY and GOOD springs) it will pull to 6,000 rpm without any trouble.

http://www.cranecams.com/?show=brows...tType=camshaft

TierAngst

Whats the part number on that cam?

kdrolt

LT4 production cam is essentially identical to the F/Y car LT1 cam... and other than a slight lift reduction, nearly the same as the copcar LO5 9C1 // 5.7 TPI cam (773 cam stamping number). The copcar 9C1 LO5 was rated at 205 fwhp vs the 180 fwhp you have now. The copcar also got the larger Ypipe, and larger injectors and a different fuel calibration stored in the chip (EPROM).

If you are looking to do a 383 later on, then IMO you should spend as little real money as you can (to save for the 383) -- so that means you ought to ONLY do cheap stuff to the engine you have now.

Cam swap: LT1 Bcar cam (probably free) or LT1 F/Y cam ($25)

92-93 9C1 Caprice Ypipe OR add the full N10 duals from a 94-96 car NOW because you'll need it for the 383.

One of the DIY cold air // filter set ups.

Put the EGR back on.

Copcar injectors/chip.

In effect you duplicate the 92-93 LO5 copcar engine, then add to it. There's more than 20 hp listed above, and you should be able to get the mileage back. HTH.

TierAngst

I was thinking LT4 cam because I'll be able to run the car without EGR just as the LT4's did. Why is it that the F-body cam being so similar to the LT4 couldn't run without EGR? My egr system was shot so its not going back on, it would cost more to replace it than it would to do the $115 cam I posted (which I don't get why is such a bad buy). I did find a LT4 cam for $50 shipped, should I grab that or get something different? Sure I can get a b-body cam free, or an f-body cam for super cheap but I'm trying to avoid the whole egr problems with those cams.

As for the exhaust I've got headers and duals on the way.

I've got an open element K&N (EDL-4222)

Does anyone have a pair of the cop injectors sitting on a shelf somewhere, I've been looking for some?

kdrolt

IIRC the LT4 was a one-year-only option in the Ycar. Aside from the larger-port heads with the hollow-stem intake and sodium-filled exhaust stem, the main differences between the LT4 and LT1 were:

1. LT4 cam had a 115 deg LSA (lobe sep anagle); Fcar had 117.

2. both cams had similar lift, but the LT4 engine used 1.6 rockers so the valve lift was greater, and that effectively decreases the LSA.

Items 1 & 2 together mean there is more overlap between the intake valve opening (IVO) and exhaust valve closure (EVC) , so some of the exhaust can get temporarily pushed past the intake valve, only to get summarily pulled back into the cylinder. That's how the exhaust gas recirculates in the engine.

That can happen on any engine that has overlap between IVO and EVC (including the LT1) but apparently there wasn't enough of it to do the job on the LT1 so it needed some external source for EGR.

So if you want to reproduce the conditions for it (in the LT4 sense) then you probably need a cam that's at least close to the production LT4 and a similar amount of valve lift. You'll also have to shutoff the EGR functions in the EPROM. The mpg will only come back to the earlier values if you can reduce friction enough, and the main one to correct would be air pumping friction through the stock factory exhaust.

TierAngst

I've already got a new chip so all thats good. So the LT4 cam won't work with the 1.5 rockers? What about the cam originally listed (213/219 .462/.471 112 1600-5200)? So should the headers/duals help out with mileage a lot (should be on within a month)?

DM91RS

Yes the LT4 will work with 1.5 rockers.

The Lingenfelter cam is expensive isn't it?

Of course it would work as long as you have the correct springs and..... retainer to seal clearance is in the safe zone. I would rather have it than the LT4 stock cam as I have it and its rather mild on a 305.


Headers and better flowing exhaust system helped my mileage IIRC. It was 10 years ago.

Oh yeah............no EGR here.

What are the cop car injectors rated at?

DM

TierAngst

The lingenfelter cam is $115 shipped, not bad at all.

The cop injectors are either 65 or 68pph I forget.

DM91RS

What rear gears do you have now?

TierAngst

2.73s going to get 3.42s come spring time

ShiftyCapone

iTrader: (7)

You will want to re-tune the chip with any mod you add. This is ever more important with a cam swap.

TierAngst

I plan on getting another chip after my next bit of mods. Will be doing cam, manifold, bored out TB, and bigger injectors at the same time. The only thing between now and then will be my exhaust.

So whats the final thoughts on this lingenfelter cam? Would this be a better choice than a LT4 cam?

Dewey316

I just realised this is on a 350

The LPE cam, wouldn't be bad. I think the 219/219 might be a very good LPE cam choice in your car, given the rest of the mods fit, and YOU are willing to put in the time to properly tune it. When you start talking about cams like this, a mail-order tune will not cut it.

TierAngst

The cam I picked out happens to be half as much as the rest of them. $115 shipped, I emailed them about the price said they ordered a ton of them to get them cheap because it was the last time they were ever getting those cams in. The rest are $250+ not including shipping. I wouldn't really be willing to spend more than $150 on a cam right now since its not going to be a permanent solution, just something to throw in for a year and a half while I save up for the 383. I think the 213/219 would have better torque than the 219/219 anyways, a must have with a 5000 pound boat.

dimented24x7

iTrader: (2)

You dont want to use alot of duration with those heads, anyway. They flow less then 180 at the intake and the power curve will likely level off before the engine reaches the cams upper powerband.

TierAngst

So whats the verdict, should I go with the LPE cam?

dimented24x7

iTrader: (2)

I think youll be ok with that cam. Anything over that could likely be counterproductive with the crappy stock heads. It would defintely make more power with better heads.

dimented24x7

iTrader: (2)

IMPO, though, id consider going with less with those heads if the cost is comprable for another roller. Its sort of in that grey area. For the price, though, its definatly worth it. If I could afford the link style retrofit lifters id like to run it or something similar with my vortec heads.

TierAngst

Well lets hope I get lucky on this

Wonder if I should start a new thread on picking out a manifold to match, if you don't think so you can post your suggestions here.