I am just curious, I will be building a 350 but I like to know what it going on around me. Who has a 270+ hp TPI 305. What did you guys put on this dog of an engine to get it that high and congratulations.

 

I do!!! Though I have not had the motor on a dyno, I did the carcraft 305 build up that they came up with 325hp. I changed a few things plus a roller motor and I hope to top the 335hp mark.


Brian Felts

 

how much did you spend, and what did you spend it on? i want to keep my 305 and i'll be working on it next year (after the exhaust and spoiler i'm done for now). i'm looking to push a little over 300 ponies to have a good all around street car (and catch a few 4th gens & mustangs by surprise on occasion )



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'88 WS6 Formula

In the mail :
SLP 1 5/8" headers, SLP 3" Power Flo catback, Catco 3" cat

Up next :
New aero-spoiler from GT Auto

 

It's no TPI, but my L69 305 can make the quarter to the tune of 14.04 at nearly 101MPH. For a 3550 pound car, that's about 285 horsepower.

I did 16 passes at the CamaroZ28.com M5 event this last October in Stanton, Michigan, of which 6 were above 100 MPH, and the remaining were 99MPH+.

I spent about $800 on the top-end of the engine, and left the shortblock alone, except for a minor change to the flycut on each piston. I ported my own 305 heads ('88 Centerbolt heads with broached valve guides), added a modified Edelbrock Performer manifold, Comp cams Xtreme Energy cam with new lifters, pushrods, roller-tipped Magnum 1.52 ratio rockers, and Comp Cams valvesprings, which I set up myself. The intake valve was enlarged to 1.94 inches, and the combustion chamber modified to unshroud the valve.


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Daniel Burk
http://www.isthq.com/~dan/fcar.html
'84 Trans Am WS6/L69
KB SFC, Moser axles, Torsen Diff., Spohn Adj. torque arm,
Ported 305 heads w/1.94"intake valves, Comp Cams XE262H, Griffen alum. radiator,
Turbine Technologies 2500 stall converter, underdrive pulleys, Crane Hi-6 & more.
1.05g skidpad verified.
Best of 14.039 at 100.82 MPH in Stanton, MI
New! 275-40-ZR17 tires on ROH ZS 17 x 9.5's

 

i have a worked 88' 305 TPI hp range should be in the 320-340 naturally aspirated,

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92' camaro
New 305 block TPI conversion, Flat top pistons,Bore over .30 Forged parts all around,Edelbrock intake,ported plennum,ported corvette alluminum heads, accel cam,52mm throttle bodie, SLP runners Home aid cold air induction, Air foil,ford SVO 19lb injectors,fuel regulator,cloys timing chain, comp alluminum roller rocker arms and pushrods MSD 8.5 mm wires, bosch plattinum plugs, hypertech cap & rotor and coil, Edelbrock TES headers, free flowing catalytic converter and a 3 inch force II flowmaster exhaust system, and a 3 inch cutout,Zoom multi friction clutch, T-5 tranny,billenstien shocks&struts.
Soon to come!!!
Procharger system 12lbs o boost.
New paint job(hawaiin orchid purple)Cast alluminum ZR1 rims w/ 275 tires.
Favorite quote: "where ever u go, there u are"

Other car;
1971 plymouth Duster
Mods:340,edelbrock victor jr. intake, 650 4 barrel holley, heddman headers,40 series dual flowmasters, cold air intake,4:10 gears, just got a new paint job and cragar rims with 315 tires in the back.
:Yeah its not a chevy but damn how many 71' dusters have u seen in the streets.

 

ws6transam your 305 weighs in at 3550 lbs???

My t-top 83 Z28 with a 350 including a driver (ME) is only 3289 lbs. Why is your car sooooo heavy?

 

and my '87 IROC weighes just 3200 lbs w/o me!! Is your an auto or stick?

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Phil87IROC
Blue '87 IROC, 383 Crate Motor, KB pistons, AFR 190 heads, ZZ-9 cam, Edelbrock RPM intake, Hooker SC/LT headers, Edelbrock 750 cfm Carb (#1411), stock T-5, GM 3.42 rear w/Auburn posi.
Ohio Valley Dragstrip Trophy Bracket WINNER - 8.39 ET on a 1.82 sec. - 60'. Best MPH = 84.44. Still Tuning Carb!
Red '89 IROC L98, TES, 700R4, T-Tops, K&Ns w/open air boxes, 160 T-stat, Hyper Chip, gutted MAF & CAT, Jacobs Ign., 53kv coil, MSD wires.

 

WS6,

Thanks for proving my point. Everyone is always praising the World S/R, Dart, and Edelbrock heads, when I have been harping on the fact that a good porting job on factory heads can do as well or better. the same goes for the valve enlargement that some people say cannot be done.

How many World S/R equipped 305s are doing that well? At full weight? And how much did they spend?



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Later,
Vader
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"Fear is how I fall, Confusing what is real..."
Adobe Acrobat Reader

 

How much does it usually cost to get heads ported and polished...including removal and re-installation? I would like to do this to my 305. I decided I'd like to keep the 305 so that I can suprise people with the fact that the car has a 305 in it. (It's a 1980 California Corvette.)

Matt

 

hummm...I would like to know that too for the 350, what are ported L98 or ZZ4 Heads like? Are the ZZ4 heads just the Y-Body heads, I would like to get some...