3 wishes for a 305 tpi
Thread Starter
Registered User
Joined: Apr 2003
Posts: 1,003
From: ny
3 wishes for a 305 tpi
if you could and only could do 3 things for a grand on an iroc-z 305 tpi automatic(besides switch motor and i already have an exhaust) what would you do for farley cheap. want more torque and highway torque
Registered User
Joined: Jun 2003
Posts: 866
From: So.Cal on the Best coast
Three Wishes..........
......would be bigger holes,biggervavles,and bigger lobes. But those are wishes and not helping you any! Two out of the three would work,and the first one don't count.
T.
T.
Registered User
Joined: Sep 1999
Posts: 2,342
From: MI
1. Nitrous Express LT1 Wet nitrous kit
2. 1-5/8" Headers + Y-Pipe (Headman possibly or hooker)
3. Port match your entire intake and Port the plenum fully
The Nitrous kit you can find used and in good shape. $500-600 can get you an ENTIRE system with all of the safety and "luxury" items you'd want including mostly a Fuel pressure safety switch, a full throttle switch, bottle heater, possibly a remote bottle opener!, the switches needed to operate, a bottle heater, a purge valve, pressure guage, and maybe more. I found mine for $650 with all of that...it was WELL used put it that way. a 75 or 100hp jetting is really fun and the torque it generates is unbelieveable
Headers and Y-Pipe you'd need to shop around a little. I was happy with the fit and finish of my old Headman headers and Y-pipe but my complaint was with the 3 bolt flanges used on the collectors, I overtightened them ans they leaked a little. I believe the Headers are a little over $200 and the y pipe is $100. Really cheap and very effective if you're on a budget and you said you are so...it's an option
Porting and port matching TPI parts. Do a search for websites with picture on doing this. I'm thinking you'd have $100 or so left and you could buy a small porting kit from Standard Abrasives or a similar company. Remove the intake manifold completely and basically smooth out the insides with sanding rolls and carbide bits. The smoother the better. Sand down any casting ridges and ridges formed by the meeting of metal surfaces, etc. The plenum can be opened up a lot internally. The ridges located just behind the front throttle body openings need to be ground down with a good carbide bit followed with sandpaper rolls.
If you have money left, K&N Air filters always help in a stone stock TPI airbox and also ducting cold air up to those new filters. Goodluck and let us know what you decide, I know I'm interested.
2. 1-5/8" Headers + Y-Pipe (Headman possibly or hooker)
3. Port match your entire intake and Port the plenum fully
The Nitrous kit you can find used and in good shape. $500-600 can get you an ENTIRE system with all of the safety and "luxury" items you'd want including mostly a Fuel pressure safety switch, a full throttle switch, bottle heater, possibly a remote bottle opener!, the switches needed to operate, a bottle heater, a purge valve, pressure guage, and maybe more. I found mine for $650 with all of that...it was WELL used put it that way. a 75 or 100hp jetting is really fun and the torque it generates is unbelieveable
Headers and Y-Pipe you'd need to shop around a little. I was happy with the fit and finish of my old Headman headers and Y-pipe but my complaint was with the 3 bolt flanges used on the collectors, I overtightened them ans they leaked a little. I believe the Headers are a little over $200 and the y pipe is $100. Really cheap and very effective if you're on a budget and you said you are so...it's an option
Porting and port matching TPI parts. Do a search for websites with picture on doing this. I'm thinking you'd have $100 or so left and you could buy a small porting kit from Standard Abrasives or a similar company. Remove the intake manifold completely and basically smooth out the insides with sanding rolls and carbide bits. The smoother the better. Sand down any casting ridges and ridges formed by the meeting of metal surfaces, etc. The plenum can be opened up a lot internally. The ridges located just behind the front throttle body openings need to be ground down with a good carbide bit followed with sandpaper rolls.
If you have money left, K&N Air filters always help in a stone stock TPI airbox and also ducting cold air up to those new filters. Goodluck and let us know what you decide, I know I'm interested.
Registered User
Joined: Jan 2003
Posts: 2,043
From: Mooresville, NC
Originally posted by doug791
well an intake manifold might be a good start. Id agree with geezer though if you want to go fast for cheap there is no substitute for putting your baby on the bottle.
well an intake manifold might be a good start. Id agree with geezer though if you want to go fast for cheap there is no substitute for putting your baby on the bottle.
SFC's
-Rippin
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Joined: Apr 2000
Posts: 1,677
From: T-town
3 wishes? Free tires for life, free gas for life, and free insurance for life.
Seriously though.....SFC's are great, headers will help a lot, and porting the intake is very cost effective (assuming you have another way to get around while it's taken apart.) That's what I would do.
Seriously though.....SFC's are great, headers will help a lot, and porting the intake is very cost effective (assuming you have another way to get around while it's taken apart.) That's what I would do.
Registered User
Joined: Feb 2003
Posts: 17
Assuming you have the peanut cam I'd put a LT1 cam in it, port the plenum & base, and get some headers. Then down the road get a set of S/R torqer 305 heads. Of course you'll need to have someone burn you a custom chip to optimize it.
Registered User
Joined: Sep 1999
Posts: 2,342
From: MI
I change my third option to GOOD tires. hehe BFG Drag Radials sized 255/40/16 or ET streets that fit nicely on your stock rims. Nothing huge, just something that sticks good, probably a 26X10.5X16 size.
Nitrous+Headers+Tires= Wave to the LS1 as you pull ahead
Then port match the TPI intake and port the plenum
it's still a cheap mod to do.
Nitrous+Headers+Tires= Wave to the LS1 as you pull ahead
Then port match the TPI intake and port the plenum
it's still a cheap mod to do.
Last edited by AutoRoc; Aug 21, 2003 at 10:19 PM.
Thread Starter
Registered User
Joined: Apr 2003
Posts: 1,003
From: ny
i think im gonna choose to to better cam with new rollers and all seals and gaskets. gm cast iron vortec fastburn heads with new pushrods and self aligning rockerarms(which i have no clue what they are) new gaskets and seals and the mandatory intake manifold and headers sound good enlightenme what i need to do also for installation
