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$2300 for a hundred+ horse. it seems to me its about the same price as rebuilding the stock LT1 top end. Can you feel the difference? Did you feel it was worth the time and money?
 

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No need to do a LT1 to LT4. You'd get 30 HP. That's what the LT4 was rated at anyways, 330 with a slightly higher compression ratio.

Go with Lloyd Elliot for the LT1 engine. From what I've read and heard he does top quality work for the LT1 engines.
 

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No need to do a LT1 to LT4. You'd get 30 HP. That's what the LT4 was rated at anyways, 330 with a slightly higher compression ratio.

Go with Lloyd Elliot for the LT1 engine. From what I've read and heard he does top quality work for the LT1 engines.
Not exactly. LT4s, in spite of their factory rating, are really closer to 350 HP in reality. And these kits also include the Hotcam which bumps it up further. But still no, LT4 heads, intake and the HC are not going to provide anywhere near an additional 100 HP w/o some other mods too. I agree, having LE, Advanced Induction or some other specialist redo your LT1 heads and provide a matching cam will get you more than the LT4 kit and for less money. For example, I believe the LT4 heads flow right around 240 cfm~ on the intake side at .500" lift. My modified LT1 heads now flow over 270 at .500". They also have had 2.02-1.60" valves installed. For my head and intake porting, oversized valves, ceramic coatings on the valves, combustion chambers, inside the exhaust runners and on the bottom of the intake, I think it was right around $1500 for everything. This didn't include valve springs, I provided my own, the 26918 CC beehives. And although I could utilize a lot more cam, I still use the humble old Hotcam. In spite of that, this engine still puts down some very impressive numbers, both on the dyno and at the strip.
 

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agree, for the price of this kit,
i got a nice AFR with 185 cc, 2.02, 1.6 valves. CNC ported.
plus 54 cc chamber (the LT4 size).

that way you can be a modefied LT4....

if you want to pay.., then pay it for some thing gives you what you are paying for.

good luck.,
 

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Yea, the LT4 conversion kits are not really the best bang for the buck now a days......most guys end up VERY disapointed with the results (both drag strip and dyno) for the money spent........I've done several of the LT4 conversion's for guys over the years and most (even with all the correct supporting mods) dyno around 330-340ish rear wheel horse power.....which is about 25 more horse power than a stock LT4 corvette from the factory....reason being: (like mentioned) the stock corvette LT4 from the factory DID NOT have an LT4 "HOT CAM" like the LT4 conversions come with....it just had the regular LT4 cam that was nearly the same as a stock LT1 cam(just a hair difference)............the packages from Lloyd Elliott www.eportworks.com and www.advancedinduction.com are a MUCH better and MUCH higher quality way of going.......Myself, I prefer Lloyd Elliott LE-2 packages for the street.........PS: the inflated ratings that people read about the LT4 conversion came from an engine dyno facility where they were using a Motec system for controls, electric WP, ECT....not indicitive of true gains that people normally get just bolting the package on..............Joe:thumbsup:
 

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agree, for the price of this kit,
i got a nice AFR with 185 cc, 2.02, 1.6 valves. CNC ported.
plus 54 cc chamber (the LT4 size).

that way you can be a modefied LT4....

if you want to pay.., then pay it for some thing gives you what you are paying for.

good luck.,
Just to clarify, Nearly all LT1 heads chambers CC out at around 54cc's(give or take) ....most LT4 heads chambers are slightly larger (about .4cc larger) ......the LT4 engines slight compression bump came from having shallower valve reliefs in their pistons.......Joe:thumbsup:
 
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