LT1-LT4 Modifications 1993-97 Gen II Small Block V8

finally made it to dynotune

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Old Jun 18, 2010 | 01:13 PM
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Default finally made it to dynotune

Just got done with my dyno tune after waiting about a year to get everything tightened up. This is my 355 with ported heads and the GM846 cam, through LPPs,cat's and a Borla. Happy with the numbers and the car is so much more driveable and throttle response is a lot better. My original goal for this car was about 425-450 flywheel horsepower so I'd say I did pretty good against the goals. torque curve looks nice too.

Time to fix the A/C, too dang hot today in Chicago

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Old Jun 18, 2010 | 01:21 PM
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nice numbers, congradulations. track times yet?
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Old Jun 18, 2010 | 06:41 PM
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no track times yet, will go sometime in july. happy to just get it smoothed out so i can enjoy it this summer.
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Old Jun 18, 2010 | 07:33 PM
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Those #'s look pretty low to be honest. I made 375rwhp with that cam on heads that only flowed 240cfm. It also looks like you're getting valve float too which is hurting peak #'s. I shifted around 6500 and peak hp was around 6200 IIRC. I would expect at least 400-410rwhp with that cam on a 355 with ported/epoxied heads.
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Old Jun 18, 2010 | 09:04 PM
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Originally Posted by speed_demon24
Those #'s look pretty low to be honest. I made 375rwhp with that cam on heads that only flowed 240cfm. It also looks like you're getting valve float too which is hurting peak #'s. I shifted around 6500 and peak hp was around 6200 IIRC. I would expect at least 400-410rwhp with that cam on a 355 with ported/epoxied heads.
thanks for the feedback, I wanted to see how it would, feels pretty good pulling, i'm still on the stock fuel pump too, so don't know if that's holding me back on the top either.
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Old Jun 18, 2010 | 09:26 PM
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Originally Posted by speed_demon24
Those #'s look pretty low to be honest. I made 375rwhp with that cam on heads that only flowed 240cfm. It also looks like you're getting valve float too which is hurting peak #'s. I shifted around 6500 and peak hp was around 6200 IIRC. I would expect at least 400-410rwhp with that cam on a 355 with ported/epoxied heads.
...you made 375RWHP with an 846 cam???

He is not using the donkey dong 847 - hence him actually making tq, and peaking much earlier .
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Old Jun 18, 2010 | 09:27 PM
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Originally Posted by merim123
thanks for the feedback, I wanted to see how it would, feels pretty good pulling, i'm still on the stock fuel pump too, so don't know if that's holding me back on the top either.
Make sure you get the valve float fixed before you take out a lifter and the cam. The stock fuel pump should be fine as long as its in decent shape.
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Old Jun 18, 2010 | 09:49 PM
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Originally Posted by Puck
...you made 375RWHP with an 846 cam???

He is not using the donkey dong 847 - hence him actually making tq, and peaking much earlier .
Same thing I was thinking and he has 12 bolt! Definately nice numbers
Have any pix of the car?
or even a dyno
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Old Jun 18, 2010 | 10:45 PM
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Originally Posted by robsquikz28
Definately nice numbers
Have any pix of the car?
or even a dyno
are you asking me Rob?
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Old Jun 18, 2010 | 11:09 PM
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Originally Posted by Puck
...you made 375RWHP with an 846 cam???

He is not using the donkey dong 847 - hence him actually making tq, and peaking much earlier .
Yep, I don't see what's so hard to believe? I currently made 430rwhp with a high 22x cam as well.
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Old Jun 19, 2010 | 12:19 AM
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good numbers for sure..........
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Old Jun 19, 2010 | 12:24 AM
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X2 the 846 cam is plenty capable of 400+ combined w the right heads. We've made over 400 with a smaller cam than that.

Who ported your heads OP?
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Old Jun 19, 2010 | 07:15 AM
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Originally Posted by gregrob
X2 the 846 cam is plenty capable of 400+ combined w the right heads. We've made over 400 with a smaller cam than that.

Who ported your heads OP?
Mike at High Flow Heads in Alsip, IL.

Here's a video of a dyno run to 6100rpm or so. If there was a valve float issue, shouldn't I be able to hear it?

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Old Jun 19, 2010 | 07:18 AM
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No...
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Old Jun 19, 2010 | 03:03 PM
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Originally Posted by gregrob
X2 the 846 cam is plenty capable of 400+ combined w the right heads. We've made over 400 with a smaller cam than that.

Who ported your heads OP?
Whats smaller then 846, a hotcam? You guys realize this is a low lift, 222int cam right? This cam is ment for power under the curve and tq, not peak hp...check out that sweet tq curve!

I just didnt know baby cams were makin 400 with crappy heads and through 12 bolts now. I must be way out of the loop.
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Old Jul 17, 2010 | 11:43 PM
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That sounds bad ***
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