73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Performance => Topic started by: 123 pugsy on June 28, 2010, 05:10:14 PM
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Hi Guys. Its been a while. I'm still around checking in every now and then.
I figured this would be a good forum for discussing an injected big block as they are truck engines.
I'm thinking of stroking a GEN VI 454 to 496 and using the Vortec intake.
I'd like to get over 500 LBS/FT of torque and close to 500HP.
Does anyone know if this is doable with this intake?
I was thinking of using GMPP aluminum heads. a higher lift cam and about 10:1 comp ratio .
Any thoughts on this?
Oh yeah...here's a peak of where I'm at with the ROD.....
Thanks,
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I think it is doable especially with a BBC.
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How about the stock wiring and ECM from a donor truck? I'd like to run a 4L80E as well.
I guess I would need bigger injectors. Can the stock computer run these or is there some kind of reprogramming available?
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500hp?....Dude you'll knock that figure out of the park easily with nice aluminum heads. I don't know anything about that intake though. That car is awesome.
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Thanks.
Its the intake that has me worried.
I've read about modifying the upper half but haven't seen anything on how its done.
I also saw on ebay a 78 mm throttle body for it but its only like 3mm bigger than stock.
Hate to put it all together and found I've built a dog.
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We are blowing 17lbs down a stock 6.0L plastic intake with a slightly bored Throttle body and making 500+. I think the stock intake will handle it. The heads are the restriction Get some off a 502 (Mark V) or these: http://www.raylarengine.com/cylinder_head.html
I don't think you could put a 8.1L together and NOT make good power. I would use the ECM also, just have it tuned.
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Is this a Vortec 454? Couldn't you buy an aftermarket aluminum intake with injector bosses and use an adapter or 4bbl throttlebody? I think that's what they reccommend on the 454ss site for the TBI guys. Then you'd need a new tune on the ECM. That's also what some are doing with the LS motors too.
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Yes, its a 7.4 Vortec.
I like the aftermarket stuff, but I'm trying to build on a bit of a budget.
The GM heads are the best price I could find for aluminum heads complete. They are the same ones used on the 502 crate engines.
http://paceperformance.com/index.asp?PageAction=VIEWPROD&ProdID=22500 (http://paceperformance.com/index.asp?PageAction=VIEWPROD&ProdID=22500)
I'm planning on using a GearVendors unit behind the 4L80E to hopefully pull off some decent mileage at cruise.
Ya, I know, a big block and good mileage don't mix. ::)
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I've read good things about those heads. Maybe you could have that intake ported and matched to your heads. I know a few places that will do port matching of the intake for around $150. The LS guys are all over the throttlebody upgrades...bigger ones, ported ones, and tricked out ones....so maybe it's worth a try.