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

how much hp can i expect/ 1/4 mile times

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Old 05-27-2009, 10:49 PM
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Default how much hp can i expect/ 1/4 mile times

From a gm847 cam completley ported n polished stock heads 355 12:5:1 compression with eagle crank on a 150 wet shop
Old 05-28-2009, 01:39 AM
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what trans, rear, clutch, converter, tires?
Old 05-28-2009, 01:59 AM
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4l60e completley built as much as it could b mt et street 3.73 gear 4000 stal
Old 05-28-2009, 02:09 AM
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My prediction is ~420-430rwhp N/A, ~570 on the gas. And no 1/4 mile times, due to a broken 10 bolt on the launch. lol
Old 05-28-2009, 09:44 AM
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Originally Posted by tspence45
My prediction is ~420-430rwhp N/A, ~570 on the gas. And no 1/4 mile times, due to a broken 10 bolt on the launch. lol
Agreed. I hope you at least have a differential cover or are considering the Bulletproof 10-Bolt procedure if you're not going to get a new rear axle...
Old 05-28-2009, 10:19 AM
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subscribed!
Old 05-28-2009, 11:05 AM
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No way you're getting 430rwhp through a 4k stall with an 847 and ported stockers.
Old 05-28-2009, 11:45 AM
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Originally Posted by Puck
No way you're getting 430rwhp through a 4k stall with an 847 and ported stockers.
why wont he?
Old 05-28-2009, 12:17 PM
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Originally Posted by shutzero
why wont he?
I'm talking real life rwhp numbers, not internet ones. This is a ported stocker 355 with an off the shelf cam we are talking about, going through a big stalled slushbox on ported stockers. Average ported stockers flow what, 265-275cfm or so? I've seen results from random local shop ported heads barely break 260cfm with the "Stage III" port job.

Then, there is the fact that stalled autos eat a TON of power on the dyno. Not to mention he would be lucky to reach 430rwhp with a t56 and the mods listed. Hoping for that in an auto would be crazy.

Not bashing any builds - I bet it will make a VERY fun street car and will run like a raped ape on the 150 shot, but there is no chance of 430 to the wheels NA with that combo. My prediction would be 360rwhp NA and right around 500 on the nitrous. In his defense "ported heads" is the most vague description ever, and if they are very well ported ~290cfm heads then he may put down better numbers, but still not 430.

I wish him the best though - none of these threads ever really end up with dyno numbers posted, but I would love to be proved wrong .
Old 05-28-2009, 03:01 PM
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380rwhp na, 500rw+ on juice


invest in a new rearend.
Old 05-28-2009, 03:35 PM
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i wasnt trying to undermind you at all haha i was just honestly wondering why he wouldnt see those numbers. ive heard people getting 400+ from lloyd elliotts le2 stuff which is why i was confused, but it does make sense
Old 05-28-2009, 07:20 PM
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Originally Posted by shutzero
i wasnt trying to undermind you at all haha i was just honestly wondering why he wouldnt see those numbers. ive heard people getting 400+ from lloyd elliotts le2 stuff which is why i was confused, but it does make sense
Yep, through a manual though Autos dyno way less.

He didn't say who did his heads though, which is VERY important.
Old 05-28-2009, 07:36 PM
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how much of a loss is there through an auto as opposed to a manual
Old 05-28-2009, 09:00 PM
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Originally Posted by shutzero
how much of a loss is there through an auto as opposed to a manual
About a good 6 to 7% more.
Old 05-28-2009, 11:36 PM
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its a local shop here in the chicagoland area that is highly recamened that guranted his port work would meet or be better then lyods numbers not sure on flow numbers yet ill post them next week and i kno dyno numbers arnt all that great through autos i was looking more for 1/4 mile times
Old 05-28-2009, 11:44 PM
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Either need to build up your suspension and rearend alot.. or just buy a new rear-end.. be sure to post a video if you don't do either of my 2 options.. I want to see what happens! The car should SCOOT, figuring you have the right parts.. which you won't ignoring the rear
Old 05-28-2009, 11:52 PM
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my bad i should have specified on suspention i have almost a full suspentions but no tubular kmeber a arms etc i have qa1 front struts and rear shocks edelbrock ta edelbrock lca and panrod bar and eibach drag launch springs
Old 05-28-2009, 11:53 PM
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So you also have torque arms, girdle covers, Subframe connectors, LCA's and brackets?

Last edited by marc97taws6; 05-28-2009 at 11:54 PM. Reason: spelling error
Old 05-28-2009, 11:58 PM
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yes siryes sir
Old 05-29-2009, 12:08 AM
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Okay well then you are more than welcome to try it! I'd still recommend investing on a new rear-end so you are a bit more worry-free ya know


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