LS1TECH - Camaro and Firebird Forum Discussion

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-   Generation III Internal Engine (https://ls1tech.com/forums/generation-iii-internal-engine-5/)
-   -   Guys here is a custom cam for my setup (https://ls1tech.com/forums/generation-iii-internal-engine/584292-guys-here-custom-cam-my-setup.html)

n2o 09-29-2006 06:06 PM

Guys here is a custom cam for my setup
 
1 Attachment(s)
What do you think? I would really like an examination from Patrick G here. It is supposed to be "friendly" on the bottle.

n2o 09-29-2006 11:31 PM

Crickets....

The stunningman 09-30-2006 06:53 PM

Might want to try PM and I hope patrick has good eyes or knows how to magnify those specs. Sorry I know I'm not Patrick just trying to help and those cricketts really bother me.

n2o 10-02-2006 08:58 AM

Yeah it is kinda small.

Patrick G 10-02-2006 09:44 AM

What size motor is this for? I hope not a 346 unless it's 12 or 13:1 compression, because a 239/250 114LSA cam has way too late of an intake valve closing point to build good dynamic compression and its valve events won't work out well with a FAST or LS6 manifold. If it's for a bigger motor, then that's a different story.

n2o 10-02-2006 11:04 AM

370 cubic inch. 3.905 bore 3.90 stroke RHS 225s and currently a 90/90.

n2o 10-02-2006 08:41 PM

So the Fast intake is a stumbling block here?

Patrick G 10-02-2006 08:52 PM

The tuned runner length and cross-sectional area of the FAST intake will try to force a power peak around 6300 rpm. The latest intake valve closing point you can go with before you start working against the intake is 47-48 degrees ABDC at .050 with a 370 ci motor. Any IVC after that is going to make you lose more power in the mid-range than you'll gain above 6300.

Your dynamic compression is going to be really low with such a late IVC. I would recommend narrowing the LSA to at least 112 to get your IVC more in line with where it needs to be.

n2o 10-02-2006 08:58 PM

It's too late this time. The cam is already in the car. I am building another motor before spring. I will post some results this week. I would like to go to the dyno, but I am definitely going to the track.

n2o 10-03-2006 04:16 PM

Do you suppose it will run 10s n/a?


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