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73-87 Chevy _ GMC Trucks => Performance => Topic started by: 123 pugsy on June 28, 2010, 05:10:14 PM

Title: 496 STROKER INJECTED
Post by: 123 pugsy on June 28, 2010, 05:10:14 PM

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,

Title: Re: 496 STROKER INJECTED
Post by: Captkaos on June 28, 2010, 10:10:44 PM

I think it is doable especially with a BBC.

Title: Re: 496 STROKER INJECTED
Post by: 123 pugsy on June 29, 2010, 05:11:00 AM

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?

Title: Re: 496 STROKER INJECTED
Post by: team39763 on June 30, 2010, 09:39:35 AM

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.

Title: Re: 496 STROKER INJECTED
Post by: 123 pugsy on June 30, 2010, 11:53:25 AM

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.

Title: Re: 496 STROKER INJECTED
Post by: Captkaos on June 30, 2010, 04:55:23 PM

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.

Title: Re: 496 STROKER INJECTED
Post by: team39763 on July 01, 2010, 09:26:35 PM

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.

Title: Re: 496 STROKER INJECTED
Post by: 123 pugsy on July 04, 2010, 08:29:55 AM

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.   ::)

Title: Re: 496 STROKER INJECTED
Post by: team39763 on July 05, 2010, 12:48:43 AM

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.