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Good N/A engines with FI?

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Old Nov 22, 2004 | 07:23 AM
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Default Good N/A engines with FI?

Let's say you had a good little 346 with a stock compression ratio and a camshaft around 244/244 @ .050" with an LSA of 108... Stock LS6 intake and ported heads.

Any suggestions as to how it would perform with say 10lb's of boost?
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Old Nov 22, 2004 | 08:03 AM
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Originally Posted by Plan B
Let's say you had a good little 346 with a stock compression ratio and a camshaft around 244/244 @ .050" with an LSA of 108... Stock LS6 intake and ported heads.

Any suggestions as to how it would perform with say 10lb's of boost?
I’m sure someone around here has that identical setup. You might be pushing it a little. For $300 you could find a set of stock 6.0 heads and drop the compression 1 point, then add heavier valve springs to avoid float, then at 10# you should be pushing over 600rw easy. Your going to have to beef up your fuel system w/ 2 pumps and min. 60# injectors. I herd it’s not good to use two in tank pumps caus it can overheat the fuel. I got a bigger in tank and a Kenny bell booster pump. Get a good dyno tune, and it should be safe. I’m only pushing 8# w/ a pair of gt37 turbos on my stock shortblock, but with head/cam/fuel I’m pushing 572rw safely for over 7500mi. For over 600rw people are adding alcohol injection for added intake charge cooling. Have fun!
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Old Nov 22, 2004 | 11:07 AM
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Neat.

Duration makes power, so I bet it would make more power than stock but I wonder what the peak would look like and I wonder if the same engine would make the same power with say a 224/230/114 cam. Hard to say.
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Old Nov 22, 2004 | 11:50 AM
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i haven't heard of anyone running a 108 lsa cam with fi.
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Old Nov 23, 2004 | 08:01 AM
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Originally Posted by Got Me SOM
i haven't heard of anyone running a 108 lsa cam with fi.
Would a tight LSA hurt power with forced induction?
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Old Nov 23, 2004 | 08:41 AM
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Yeah, you'd have a hell of alot of lost boost with a 108 LSA. (actually I never seen an LS1 cam with that LSA) Boost would come in and bleed right out before the exaust would close....lol
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Old Nov 23, 2004 | 10:51 AM
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That cam is not optimal for a blown setup but I bet the midrange would be pretty neat.
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Old Nov 23, 2004 | 11:22 AM
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yeah i will 2nd or 3rd what these guys are saying.. that LSA of that cam will do more harm them good.... you can still do a big can though..... if you have the valve clearence go with a 238/244 on a 114 LSA My 230/236 on a 114+4 sounds wicked.... esp. with my cutout open..
Kyle
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Old Nov 23, 2004 | 04:50 PM
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I’m currently running a Vortech V2-SQ in a 346 on stock compression with this cam. The car weighs 3900lb and traps over 132mph over the ¼ mile.

The pulley is just the 8 rib Vortech deal with a 3.15” pulley at the blower. I tried the 2.85” pulley but the boost was far too much for pump fuel as this is just my daily driver work truck.

Originally Posted by Pro Stock John
That cam is not optimal for a blown setup but I bet the midrange would be pretty neat.
The midrange is neat John. So is the bottom end grunt and the rev limiter is set at 6,800rpm. However, if what you guys are telling me is correct, I wonder how much power I’m actually throwing away.

I’m a little concerned about just widening the LSA because I feel that it would throw out the overall dynamics of the camshaft.

Originally Posted by NA$TY-TA
yeah i will 2nd or 3rd what these guys are saying.. that LSA of that cam will do more harm them good.... you can still do a big can though..... if you have the valve clearence go with a 238/244 on a 114 LSA My 230/236 on a 114+4 sounds wicked.... esp. with my cutout open..
Kyle
Do you know anyone who has tried this 238/244 114LSA cam? Perhaps I could compare notes with them.

Pete.
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Old Nov 23, 2004 | 04:53 PM
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I know Brian (BIG BOS) has a 236/242 on a 114 in his 370ci motor..... thats the same cam i was going to run but i decided to run my smaller 230/236 cam..... I shift at 6600 rpm in my car and my rev limiter is at 7000.
Kyle
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Old Nov 23, 2004 | 05:07 PM
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Originally Posted by Plan B
I’m currently running a Vortech V2-SQ in a 346 on stock compression with this cam. The car weighs 3900lb and traps over 132mph over the ¼ mile.

The pulley is just the 8 rib Vortech deal with a 3.15” pulley at the blower. I tried the 2.85” pulley but the boost was far too much for pump fuel as this is just my daily driver work truck.



The midrange is neat John. So is the bottom end grunt and the rev limiter is set at 6,800rpm. However, if what you guys are telling me is correct, I wonder how much power I’m actually throwing away.

I’m a little concerned about just widening the LSA because I feel that it would throw out the overall dynamics of the camshaft.



Do you know anyone who has tried this 238/244 114LSA cam? Perhaps I could compare notes with them.

Pete.
Wha'ts your setup? I would say you can easily trap 140 by going to a 114-116 lsa with the same duration.
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Old Nov 23, 2004 | 05:26 PM
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What do you shift at?

The 8.0/3.12 crank/blower pulley combo is the stock pulley combo for the LS1 kit.
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Old Nov 23, 2004 | 05:41 PM
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Originally Posted by Pro Stock John
What do you shift at?
A little over 6,000 I'd say. I haven't logged it yet.

Originally Posted by Pro Stock John
The 8.0/3.12 crank/blower pulley combo is the stock pulley combo for the LS1 kit.
Ok that's the one, this gives me near on 10lb's of boost at the back of the manifold. Does that sound about right for this pully set-up at 6,500rpm?


Originally Posted by Got Me SOM
Wha'ts your setup? I would say you can easily trap 140 by going to a 114-116 lsa with the same duration.
Wow!! My calculator tells me what your saying should give me another 100fwhp used over the distance.

I guess it would idle a little nicer too huh?

Does anyone have any rwhp figures on simular set-ups with this style (wide LSA) cam?
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Old Nov 23, 2004 | 06:09 PM
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I wouldnt say 100 ... thats way off in my opinion.... id say 20-30
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Old Nov 23, 2004 | 08:04 PM
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i say go for it, you'll make good power either way.. spend your money now on good parts, and switch out the cam later if the rev range needs fine tuning for your driving style.
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Old Nov 24, 2004 | 09:05 AM
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Originally Posted by MIGHTYMOUSE
i say go for it, you'll make good power either way.. spend your money now on good parts, and switch out the cam later if the rev range needs fine tuning for your driving style.
Thank you MIGHTY, that's seems to be the answer at this point. Thanks again....

Originally Posted by NA$TY-TA
I wouldnt say 100 ... thats way off in my opinion.... id say 20-30
I guess so NA$TY-TA, Though id say + 20-30 rwhp aint gunna pull my barge another 8+ mph through the traps over the current 132mph she's a heavy bitch. 3900lb. It would be nice though.
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Old Nov 24, 2004 | 10:48 AM
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Plan, my old cam was 230/236//115. I peaked at 6800 with my old setup.

My new cam is 236/246//114. We are planning for it to make more power all throughout the powerband, but still with a theoretical max shift point of 7200.

Honestly, duration makes power, and overlap is an important consideration but you are shifting your car at the right rpm for that particular camshaft. Also blowers tend to shift peak hp up a few hundred rpms.

10 psi sounds about right intercooled. They also make a 2.95 pulley.

I'd focus on cam in the 114 lsa range but I would talk to Kurt Urban and spec out a cam with him.
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Old Nov 25, 2004 | 01:07 AM
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Thanks John, much appreciated...
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Old Nov 25, 2004 | 11:51 AM
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who is kurt urban??
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Old Nov 25, 2004 | 07:00 PM
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Wheel to Wheels very own.


Plan B... you out there proving us wrong again doing things most wouldnt or what.... good luck if you change... that was gutsy going with your current combo.
Originally Posted by Got Me SOM
who is kurt urban??
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