LS1 performance potential

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Dec 28, 2004 | 12:34 AM

65roadster

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From: Orem UT

LS1 performance potential

I have a low mileage LS1 from a 2002 Camaro that I am contemplating for an engine swap into a NOM C2 roadster (1965 MY). What modifications are required to produce 450 hp, without replacing the heads? Can 500 hp be realistically acheived? Thanks in advance. Also, the automatic transmission from the vehicle is for sale.

Dec 28, 2004 | 11:49 AM

65roadster

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From: Orem UT

More specifically, what maximum power/torque can one expect from a streetable naturally aspirated LS1 with stock bore, stroke, heads, pistons, and gasoline only as the fuel? The only modifications would be to increase volumetric efficiency, and perhaps enhance fuel delivery and ignition. Modifications could be mechanical or electronic, or both. Any data or opinions out there?

Dec 28, 2004 | 01:31 PM

AN1313

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From: Philadelphia PA

The hp potential of a 346 with stock LS1 heads is quite high. A cam only upgrade could get you up to ~440RWHP. Adding NO2 as well could get you quite a bit more. Also, consider a supercharger if you want greater than 500RWHP that is always available.

Dec 28, 2004 | 01:49 PM

Jerseyboy

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Whats your definition of streetable? That's a pretty subjective variable. Some guys want smooth idle, others are willing to run 24x/25x on a 110LSA and call it streetable. 450fwhp with a small cam, good air intake system, longtubes and no cats should be easily attainable.

Jersey

Dec 28, 2004 | 04:13 PM

Automag928

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From: Lutz FL

You are going to be around 400-410rwhp depending on your cam...You can go radical like the TREx or stick with a more "tried and true/nicer" TR 224. You can milk maybe 430rwhp but you are going to have to suffer the driveability...Either way, with decent headers, intake, exhaust and a "nice" cam, you are going to be right around 400rwhp...

Dec 28, 2004 | 05:19 PM

65roadster

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From: Orem UT

"Streetable," and cam nomenclature

Streetable, to me, means that the engine will idle without constant throttle manipulation, and that the engine does not produce less low end torque than stock. Also, the throttle response should feel at least as good as stock. I am not concerned about the smoothness of the idle -- I like the uneven sound and vibration resulting from cam overlap and perhaps lower flow velocities at low engine speeds.

Now, some nomenclature questions:

To what does "24x/25x on a 110LSA" refer?

What is a "TREx" and "TR 224?"

Thanks.

Dec 28, 2004 | 07:48 PM

H82GOSLW

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From: Upstate NY

Quote:

Originally Posted by 65roadster

Now, some nomenclature questions:

To what does "24x/25x on a 110LSA" refer?

24x/25x refers to the duration of the intake and exhaust opening

LSA is lobe separation angle, lower the number lopier sounding the engine is.

What is a "TREx" and "TR 224?"

TR is Thunder Racing. TRex and 224 are two popular cams made by this company. Quite popular these days.

Thanks.

Good luck in your travels and keep us posted. Many on this forum have been quite successful in modifying their LS1s, I've learned quite a bit from them.

Dec 28, 2004 | 08:00 PM

65roadster

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From: Orem UT

Cam nomenclature

Thanks for the response. I have been out of the loop -- what we used to refer to and specify as valve overlap is now apparently quantified as LSA. Are the 24x/25x duration values given at a particular valve lift or angular displacement from the endpoint of the base circle segment? Thanks.