mixalive

Hi guys.
It has been a while since I have posted anything, but am in the forethought process of how I want to rebuild the stock LT1 in my 92. I want to attain about 375hp at the rear wheels. In some other forums, I am seeing a recommendation of having the stock heads and intake ported instead of an Edelbrock Performer head / cam package.
Elliott Sportworks is coming up as a company that can port the heads, intake and provide a custom grind cam. Just wondering if anyone on this forum has used them for their LT1 and their experience with the company.

Thanks in advance for your input.

Terry

GREGGPENN

I believe member "biggrizzly" used Elliot. Seems like he posted a couple of pics too. That was a couple of years back. But, I think he has/had a pretty visible build thread too.

mixalive

I found it, Gregg.. Thanks..

1963SS

I've used them a lot. Lloyd Elliot is one of a few very good porters for our heads. I've used him a lot and also Advanced Induction. Lloyd ports by hand and Advanced Induction is a CNC operation. Both are excellent and Lloyd is a bit less expensive. When it's all said and done there won't be much difference in horsepower.

For your relatively mild expectations of 375 HP at the wheels then the LE2 package will get you there.....easily, as long as you have the supporting mods.Lloyd Elliot's cost for a head and cam will be around $1600 and AI will be a bit more at about $2200.

The other option is a set of AFR 195cc heads and a custom ground cam. That will cost about the same as the Advanced Induction setup.....not too much difference, if any, at all. With the AFR's you'll have better flow especially on the exhaust and still have your stock heads that you could sell (to offset some of the cost) or just keep if you wanted to go back to near stock at some point in time.

There are several good options for our cars.

dizwiz24

be careful. AFR is using some unusual techniques on the flow bench.

I believe they use 'pipe' on the exhaust side vs. a curved header. (If I understand it right).

'Pipe' will generate higher #'s. So you cant compare those #'s to whats on Lloyd Elliot's website.

Also, flowbenches are different, ambient air temp will affect flow rate. Many variables.

LLoyd Elliot has told me that he hasnt been able to duplicate the exact #'s AFR claims on his bench. He says his bench is a little 'conservative'.

His reputation is such that I dont think he has to exaggerate anything. I trust him.

Dont get me wrong, AFR are great heads. If the OP went with the comp. ported AFR 195cc heads, a cam, and 1 3/4" headers he'd prob make 400 rwhp...

cv67

The pipe Ive seen AFR used is the same as any other.
Its curved far as I know could be wrong.

Never seen a flow sheet with any LE head they get directed to his website no? Does he include one with each port job he does or is it extra?

Some benches can be a few cfm off from eachother

What you see a lot of on the web is inflated #s via cheating.
Flowing a head on a larger bore gasket is one

If their fixture isnt the same the intake can be off or how they clay it in also. I wouldnt pay attention to a few cfm either way

rodj

http://www.camaroz28.com/forums/lt1-...umbers-277074/

LTxDave

Lloyd ported a set of AFR heads I had done locally. He gave me before and after numbers. The before numbers were essentially the same as what the local guy had claimed. The after numbers were much better. I'd definitely use Elliots Portworks again.

blkzr1

hi, i just got finished with the LE2 package on my 1995 lt1 383 with very low compression pistons in it, -16cc. (it came with the 383 already built with the car). i have the ASM 54 mm throttle body, long tube headers, corsa exhaust, 32# injectors. the package came with the cam #clt 280/288-11hr. this combo made 375 hp and 386 tq on the chassis dyno at henderson performance technologies. i wanted more but with those pistons, i am not going to get it. i also have 3.07 gears which dont help alot and the heads and intake were touched up by ron, cuisinartvette on the forum. hope this helps. see ya

GREGGPENN

What pistons? Assuming they are aftermarket and good quality, 16cc dish/dome pistons aren't bad. With stock 54/58cc heads, your compression would be fairly high.

Nice TQ.

SouthernSon

Good numbers. I have OEM LT4 bottom end, Lloyd Elliot ported LT4 heads/manifold, long tubes, HOT cam, 32# injectors, 52mm TB and got 372hp/355torque on load bearing dyno. Still running heavy, oem dual mass FW. The LE porting gained 30hp at rear. I also get 25mpg at 78mph.

GREGGPENN

For comparison....

http://forums.corvetteforum.com/1568917940-post20.html

blkzr1

i am not sure about the piston maker or type, this engine was already built and in the car when i bought it. i think it was set up for turbo or supercharger. it dynoed, with the stock lt1 heads, intake and cam with 1.5 roller tiped rockers and stock throttle body, at 300 hp and 352 tq at the wheels. the le2 heads checked out at 52 cc and i used the old reliable, sometimes unreliable, felpro pt9966 gasket, .040 thick because the ra was fairly rough on the block surface and i did not think an mls head gasket would hold. i also opened up the oil return areas in the head gasket ends to allow for best oil return as i do run the engine at high rpm for longer periods of time in open road racing. the engine has the comp cams 1.6 roller rockers in it now and i am using the gm stock type lifters for the lt1. the pushrods are the comp cams .080 wall thickness. also, i am using the opti spark and it has always worked flawlessly for me. i also put the gm extreme duty roller timing set in the engine and a new gm waterpump. after i started the engine i noticed a squeeling noise in the engine and thought it to be the the new timing set after much searching on the forum. i took it apart 3 times and even put another new set in. long story short, it was the new water pump. i hope that this information will help you mixalive. see ya

96 lt-4

Was not pleased with the LT4 heads Loyd did for me.He was very easy to work with and he bought them back from me no questions asked.
Very happy with the AFR heads on my 383.

SouthernSon

Why?

96 lt-4

I had to redo the valve job just to pick up the power I lost from bolting them on.The hp and tq numbers were very peaky with a noticeable loss of tq and hp throughout the curve.It suggested to me the runners were to large and the valve job was of poor quality.
I may be in the minority here but it did'nt work for me.
He bought back a better head than he sent at my expense.

1989TransAm

"The pipe Ive seen AFR used is the same as any other.
Its curved far as I know could be wrong."

Ron you are right. I had Tony check my AFR 195 heads and he does use a pipe with a bend in it on the exhaust. It seems to me using a pipe would be the correct way as that is what is used on the motor. The exhaust does not just go out into the atmosphere. There just needs to be flow bench standards that everyone uses.

ddahlgren

The alignment of pipe to port is a very big deal as well. Header manufacturers I think need to pay a lot more attention to this as they seem to go with fits 95% sort of ok. At the end of the day a large percentage can be gained or lost from it.

tpi 421 vette

I had LE port a set of LT4 heads to his stage 3 port job. He said the intake port volume would be 220cc's. The heads poured 243cc's on the intake port. He was 23cc's off from what he told me. I installed them and the car was smoking antifreeze. Turns out he poked a hole in the intake port. I returned them, and he said he fixed them and sent them back. I had a local machine shop pressure test them before reinstalling them and they still leaked. I had to ship them back three times to get them finally fixed. What if I took his word and went ahead and reinstalled them? I would have had to pull them back off. He obviously didn't pressure test them. Then I had them checked out locally before reinstalling them, and all the new valve guides he installed were fitted too loose. So I had to have new guides installed, and once you do that, it usually needs another valve job. After all that the heads ended up flowing 300cfm@.700 lift. The AFR 195 comp port head would outflow it to .600 lift. So after everything, I had to pay shipping three times to send them back, had to pay for all new guides and another valve job and pressure testing. I had to pay for all the gaskets to redo the job, and ended up eating the labor of remove and reinstalling the heads. And the intake port ended up being way bigger than it was suppose to. I won't use LE again.

SouthernSon

Wow, bad experiences for sure. Perhaps he has better QA now but mine from a year ago are doing great. Much smoother now at the 3200rpm area where I had unevenness with oem and, as said earlier, picked up 30HP on the dyno.