my friend just got an 89 rs camaro with a 305 tbi and wants to soup it up a bit. he gave me a list of stuff 2 type here to see if it will all work and how much power should it give....

-Summit engine rebuild kit for 76-93 305's with forged pistons and 8.64 compression ratio with a 64cc head
-GMPP TBI heads for 87-95 fuel injected cars ~$290 each from scoggin dickey, 64cc chambers
-Holley projection TBI manifold or edelbrock ported to fit the new TB's bores
-Holley 670 cfm TBI for 5.0 truck
-Open air element
-Cloyes true double roller timing chain
-Crane Powermax roller cam 208/214 .438/.452
-Crane 1.5 or 1.6 gold roller rockers
-Edelbrock TPI headers
-high flowing cat
-Edelbrock catback exhaust
-hypertech cap/coil/rotor
-MSD wires
- TCI breakaway converter approx 1000 rpm more stall over stock
-342 posi rear
-b&m shift kit
-rebuilt 700R4
-custom comp programming maybe to help with the lockup etc? or is a hypertech chip enuff?

thanx! sorry it was long

 

 

You're getting 14.1 out of a 305 TBI?
How much did the parts cost for your mods?
What was your most significant increase?

------------------
1992 Pontiac Firebird (stock)
- 305ci V8 TBI / Automatic Trans / Every option, excluding leather
- Killer car audio system:

• Aiwa CDC-MP3 head unit
• Rockford Fosgate 360a2 amp
• pair of 12" MTX Thunder 5000s in a custom box
• Pioneer 3-way 6x9s, soon to add more more more!

 

do you mean 275 w/the settup in my original post, or the settup u listed? if he does get the 4 bbl intake w/adaptor plate, which intake should i get since he wants to keep his emmisions crap working. performer rpm, perofrmer? holley intake? help! thanx! hell if the comp ratio is higher, then if i rebuild maybe port/polish the stock heads, would that give me a lil more power? thanx 4 the help!

 

 

The only two things I don't like are the head choice and compression ratio. Unless your friend is going to be running lots of N2o or planning on getting a s/c setup then just rebuild with cast or hypert. pistons.
Go with the vortec heads, after the mill job and everything you will have some serious power potential with that cam.
About the MSD wires, use them. Use anything other than delco wires. The thicker >8mm wires will last longer and provide less resistance (that's a good thing). My last setup of delco wires lasted not even a year and only 10K miles! No they weren't touching the headers and the distrib had new rotor/cap. The stock boots just started to fall apart at the spark plug, really pathetic. Besides, the better wires are only $10 more at about $50 for a good set. $10 well spent, never arcs at the distrib and peace of mind.
The TCI converter is a good piece but get a trans cooler for SURE. The th700 will handle 400hp and about 450 lb-ft before needing some beafier parts. The shift kit when done right, makes for a longer lasting trans. The clutch plates when the slip make dust and more heat. The faster shifts reduce friction and friction is the trans killer. My trans has almost 150K on it, one rebuild about 18K ago and SLP shift kit. It's behind a strong motor now and it shifts great even with no trans cooler (stock torque converter so no need yet).
You'll probably make 280hp with 1.6 rockers and vortec heads with 9.5:1 compression. With TBI heads you will loose big time, the combusion chamber is a joke and the intake port is "swirl" = crap velocity, good for street, bad for performance. Vortec heads are by far the best thing to come out for the budget minded hot rodders and it's a shame the TPI guys can't use them yet .
I'm glad to see you know that a custom eprom is best.

------------------
, Jon (350 TBI!)
91 Red My website

 

 

 

where do i get the vortech heads? r those the ones that r in jegs for like 220 each? w/1.94/1.5 valves, or is that the wrong one... thanx! do i need the performer rpm vortech intake manifold if i get the vortech heads? thanx!

 

off topic: ws6 email me and give me a hand with my 305, will ya? oej2k@icqmail.com

------------------
1992 Pontiac Firebird (stock)
- 305ci V8 TBI / Automatic Trans / Every option, excluding leather
- Killer car audio system:

• Aiwa CDC-MP3 head unit
• Rockford Fosgate 360a2 amp
• pair of 12" MTX Thunder 5000s in a custom box
• Pioneer 3-way 6x9s, soon to add more more more!

 

why are you rebuilding a 305? are you gonna put a blower on it? might as well get a 350 for $1500 at www.sdpc2000.com not bad. can't port the edelbrock. Since that intake is barely more than a carb intake with TBI top, you're better off with a carb intake and TBI adapter. That way you can change intakes easy or put on a carb if you want. very good. Cowl hood would kick *** on a camaro with this. cool LT4 or LT1 cam would probably be cheaper. waste of money. Get heads that use guideplates and use cheaper full steel rollers. They're cheaper and weigh less at the valve stem tip. SLP and Hookers are better. That Edelbrock double D crushed Y pipe is rediculous. all new cats are "high flow" stainless steel, little quiet at idle but whatever floats your boat. www.carpartsonsale.com has excelent prices on edelbrock products. Racers use MSD. I'd get all matching MSD ignition stuff. I dunno much bout that. I'd rather have a stick. you can get a v6 rear with these gears for $50 but if you have to get gears installed, go with 3.73s. I'd rather have a stick but whatever I don't think the chip handles lockup. I could be wrong. Think you'd need more than a hypertech chip once you change the cam.

------------------
-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Soon to be installed:
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

[This message has been edited by Tas (edited July 03, 2001).]

 

ok..... so about these heads. some1 told me a while ago that corvette aluminum L98 heads will qork really good on a 305 tbi, is this true? its either get the L98 heads leave them stock, fix the stock ones, or get the L98's and port them. i thought those would be a lot better than the tbi heads since the the L98's have 58cc chambers, not the 64cc, and were gettin second thoughts about rebuilding, we'll prolly just leave the bottom end stock.

 

o, and we decided to use either the LT1 or the LT4 cam or the crane one. help us pick it out, which one should we use?

Stock LT1 Cam think its like 201º/208º .447"/.459"
Stock LT4 Cam what does i have, 525 lift w/1.6 rockers or somethin like that?
Crane Cam 208º/214º .439"/.452"

need just a streetable cam that can make this 305 run really strong. =) thanx

 

 

I thought the LT1 cam had .450, .450 lift for the first design and .450 .465 for then second. the .465 is probably wrong but its around that.

------------------
-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Soon to be installed:
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

 

220hp if you are lucky with that exact stuff.

 

hey FB what's up. I got some TJ flares and am about to make my own rocker gaurds from angle iron. I got soem TJ steps coming too. I'm gonna put on my 1" body lift when I do that too.

He should have more than 220HP. Andy89RS has about 230HP with stock heads and cam, full exaust, open element, full ignition, and ultimate TBI. his cat is only 2.5" too with the 2.25" edelbrock TBI y pipe.
-Tas