Hey whats up guys. Im new here. I was wondering what I would have to do to stuff the 502RamJet into an 87 IROC and still be able to drive on the street. Actually I wouldnt mind putting in a smaller crate engine if i could get around 450hp to 500hp. I was looking at the 383 it produces around 450hp i think. Or if someone has something better by all means tell me. please

 

If you were to do an archive search you can find alot of information on this topic. This question comes up at least once a month.

As for 450 streetable hp, I have/had (it's dead now) a 450 hp 402BBC in my 87 RS. I couldn't imagine trying to drive a SBC with that kind of power on the street. Bigger engines are easier to drive when your pushing the envelope of whats streetable and whats not.

 

Having a small block producing that kind of power usually means going to about 6500 rpm. On the street you usually don't go much over 3000. A big block can easily produce that kind of HP and at a much lower usable rpm.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

i have a recipe for a 507 horse 525 lbft 383......i can post them if you like...it's carburated and runs on 92 octane pump gas...not sure of milage


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1991 RS LO3
mods: 14" chrome air cleaner, straight-piped after cat exhaust with one chrome dual tip on the left side.
future mods: headers, removing smog equipment, and as many cheap mods as i can find
aol s/n: budman8503

GONE MUSTANG HUNTING.......
BACK IN 10 SECONDS

 

I too have been looking for a streetable SB crate engine, and I have found it. This is the motor I am ordering in a few weeks, take a peek. By the way, I am getting both the options installed too. Should be good for about 475 to 500 Hp, depending on cam.
http://www.allchevyengines.com/406-435.htm

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BigBlockJason
85 Z28 T-Tops
http://communities.msn.com/JasonsStuff/homepage

 

That's a reasonable setup. Looks like it will work really well

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'89 Firebird, RED!!!
B&M blown 468 big block
Tremec TKO 5-speed
Strange 12-bolt
Kenny Brown Competition Suspension
Read all about it!

 

The biggest problem with fitting a big block is the headers. I used the Hooker Super Comps and they were not even close to fitting. There are a few other manufactures out there that might fit better.

All the info you need for the swap is on my page.

Miles

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88 427 Camaro
12.18 @ 113mph 1.75 60ft
Currently installing 3.73's into my 9 bolt (YES,it is a 9 bolt & YES they are 3.73's, not 3.70. 4.11's to follow soon )
www.koolmeister.com

 

After I got my Hooker big block headers (and I got a deal on them) I saw some Sanderson headers. Just for the ease of installation I'd go with them for a big block street car. The only difference is that they're not equal length headers so they fit a lot easier.

 

How much power will you lose with the sanderson headers not being equal length?

 

I doubt you'd notice a difference unless it was on a dyno.

 

In NHRA Super Stock there is a class with big blocks in third gens. I wonder how they do it because no frame mods are allowed.

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'88 IROC TPI 355, '69 truck 4-bolt, fully balanced, 9.75:1 compression, fully ported '70 truck heads(for now), Harland Sharp 1.6 Roller Rockers, Comp Cams CS 252AH-12, ported '86 TPI converted to speed density, Crane AFPR, Flowmaster 3in. exhaust, Edelbrock TES headers, all emissions equipment is still intact, plan on burning my own chips, many more mods and parts on the way as time and money permits =(
Best E.T. with TBI 305: 16.11 @ 82mph
Haven't been to track with new motor
If you have any questions on converting from TBI to TPI email me at jdkchevy70@yahoo.com
In memory of Dale Earnhardt, I'll miss cheering for that black #3 on raceday!!!

 

To; BIGBLOCKJASON
I see you are going with the crate motor good
move. You have passed Engine Building 101.
Good Luck

 

Yeah, I had to give up the fight with the 468 I was building, I ended up with $5,000 in just the short block, no heads even. I would have had over $10,000 into the entire setup
So, I sold the short block for $4500 and am now researching witch SB to stick in it, Right now its looking like that 406 crate, and AFR 210's, and the roller setup. Gonna run it carbed until I have enough cash for a Miniram. That combo should get me all the Hp I need.

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BigBlockJason
85 Z28 T-Tops
http://communities.msn.com/JasonsStuff/homepage

[This message has been edited by BigBlockJason (edited April 09, 2001).]

 

Don't modify the frame, that's how.