Has anyone thought of this before

[WarWagon]

No problems A.J.
CharlieF1 I didn't mod too much on the stock drawthru setup. I just wanted it to work as buick intended, because It didn't when I was first running it. I found the that the intake manifold itself was one of the major limiting factors on power. Single plane with long bending runners Great for torque not so great for power. Then the stock drawthrough camshaft is low on lift and duration, also designed for torque. It's smaller than the '84-'85 hot air cams, and even smaller than the '86-'87 intercooler engines. IMHO if one used a larger open plenum single plane intake manifold and use and adaptor to mount the drawthru turbo on top of it and swap out the camshaft, It could be a performer whether it had the cast or tubular exhaust manifolds.

 

[WarWagon]

On my own car on the chassis dyno I had already surpassed the stock '86-'87 gn/ttype power numbers Without an intercooler and with a blow through carb severly out of tune 17.4++ AFR, of course none of it was even close to any factory setup

 

[charlief1]

No problems A.J.
CharlieF1 I didn't mod too much on the stock drawthru setup. I just wanted it to work as buick intended, because It didn't when I was first running it. I found the that the intake manifold itself was one of the major limiting factors on power. Single plane with long bending runners Great for torque not so great for power. Then the stock drawthrough camshaft is low on lift and duration, also designed for torque. It's smaller than the '84-'85 hot air cams, and even smaller than the '86-'87 intercooler engines. IMHO if one used a larger open plenum single plane intake manifold and use and adaptor to mount the drawthru turbo on top of it and swap out the camshaft, It could be a performer whether it had the cast or tubular exhaust manifolds.

You're completely right about the intake. What I've been looking at is cutting the top of the runners off and welding some sheet aluminum on it to help with the flow numbers. Since the racing classes for the buick mostly favor the SFI cars there's nothing I can run except bracket so I might as well try to get her as fast as I can and still stay as close to stock as possilbe.
BTW, from what I've been reading on your frakenstien turbo you have basically what I've been building for the stock set up. How's she feel when you get her going?

 

[dr_frankenstein]

Oh MAN! thats the ticket! Thats a genius idea!

WHAT if one of our cars challanged TSM? or TSO? and by miracle of good ol'JC we were allowed to run........

****... id buy a regal body for that.

could you imagine the look on peoples faces if a carb car won?

like sweet car porn

A.j.

 

[WarWagon]

Charlie My car Ran GREAT! It still runs but only on 5 holes. I didn't get a chance to get the car back to the track before I broke it but Illegally on the street It was hard to beat. Once I got the carb tuning right and could keep the AFR at or very close too 11.5 which was it's favorite spot, It ran really well. It has a short narrow power band like 2k rpms from 2500 to 4500 it was a runaway freight train. I'm still only a 3 speed (TH350) with 3.42 rear gears I could completely top out in 3rd with the six screaming at 4500 before you know it. I have a less than 1/4 mile straight in front of my house and I run out of gear and revs before I'm out of road, and the car feels like a wet noodle and all floaty during these times. Now I'm running around 20psi during all of this. If I ever hit the spray it's just instant boost and redline, shift repeat, it's all over too quick really.

 

[WarWagon]

I like the idea of putting a upgraded drawthru turbocharger ontop of a large open plenum single plane intake manifold. If you could gouge out enough material on a stock intake and make it a pretty much straight shot to all the runners in the head, I think you would have yourself a winning intake manifold. My weiand Intake manifolds are So very similar almost Perfect copy ALMOST of the '86-'87 LOWER intake. The upper portion of the '86-'87 intake manifold is just completely weird.

 

[dr_frankenstein]

I like the idea of putting a upgraded drawthru turbocharger ontop of a large open plenum single plane intake manifold. If you could gouge out enough material on a stock intake and make it a pretty much straight shot to all the runners in the head, I think you would have yourself a winning intake manifold. My weiand Intake manifolds are So very similar almost Perfect copy ALMOST of the '86-'87 LOWER intake. The upper portion of the '86-'87 intake manifold is just completely weird.

but ya know, it wouldnt be hard to fab a plate to fit an 87 lower intake. i have thought about this, but have decided that a Weiand with a Brodix "Turtle" in the center is just the ticket like you had mentioned.

The thing I worry about is low RPM power with the single plane, I have one now............ wait, i had one yesterday before my bottom end went ca-puut....... and it was a dog on the bottom, I was using the 4.56s to get a decent launch, all on a turbo 350! it was 5800 rpm doing 65 back and forth to work every other day. So I know your pain on the highway.

This is good brain storming!

A.j.

 

[WarWagon]

Good thoughts here. In my engine I'm running a stock '87 GN camshaft, That along with my intake manifold are about perfect. I pull 16 in/hg at idle which is like 750-825 rpms and I have a large for a V6 throttle bore in my BG Demon and It's really driveable still makes enough torque even under 2000 rpms to do any loading I give it, But once I start to creep up past 2150 It just gets better and pulls harder, I cannot EVER nail it under 2200rpms MAYBE just MAYBE say if I have a smaller Carburetor like a 625cfm or 650. So using a stock '86-'87 GN lower intake and covering the top of it with a plate and adding what ever kinda hole or flange on that plate the choices are limitless. and as for the injector bosses!!!! Instant direct port nitrous injection or multi point alky injection.

 

[dr_frankenstein]

Its like you can read my mind.

Charlie! I think we have another on the 10sec plate!

care to join our gentlemens race to 10sec Adam? first one there with a carb wins!

:biggrin: A.j.

 

[WarWagon]

Psychic
Yeah count me in lol I think I'm pretty close.
I haven't been to the track but I'm pretty sure I already passed up the 12's

 

[bobwieser]

on the intake subject.. has any one ever heard of extrude honing and if so tried it on anything ? i have been curious about this as i have a spare intake to mess around with...

 

[bobwieser]

not sure if thats the proper name for it....

 

[WarWagon]

Heard about it, "AFM" abrasive flow machining. Don't know anyone who has tried it on a drawthru intake.
I'm pretty sure Extrude hone is the company that developed that.

 

[charlief1]

on the intake subject.. has any one ever heard of extrude honing and if so tried it on anything ? i have been curious about this as i have a spare intake to mess around with...

I've been trying to find someone that has the extrude hone equiptment so I can see how well it works but I haven't had any luck so far.:frown:

Heard about it, "AFM" abrasive flow machining. Don't know anyone who has tried it on a drawthru intake.
I'm pretty sure Extrude hone is the company that developed that.

You are 100% correct on this Adam. What I've been thinking of is a little different though. I'll see if I have the metal do do what I've been thinking about. I had an aluminum Hertz sign that was some really heavy stuff and I think I still have some of it left over for the intake.:biggrin:

Its like you can read my mind.

Charlie! I think we have another on the 10sec plate!

care to join our gentlemens race to 10sec Adam? first one there with a carb wins!

:biggrin: A.j.

As long as it's a draw through we're even Aj. All I'm after right now is to see what I can get as far as a record breaking car. No jokes please.:biggrin: If one of us can break the 13 second barrier then we're in and I want to see the faces of the guys when it happens.:biggrin: Between all of us we shouldn't have a problem I hope, but you never know. After all, look at your last adventure Aj.:biggrin: LOL Hadda, sorry.:frown:

 

[dr_frankenstein]

Between all of us we shouldn't have a problem I hope, but you never know. After all, look at your last adventure Aj.:biggrin: LOL Hadda, sorry.:frown:

LMAO! yea no doubt! I have a wicked bad habit about pushing it way to hard.

You live, You learn I guess.

A.j.

 

[charlief1]

LOL Still waiting on the pics Aj. I want to see what's going one in lost causes. LOL

 

[dr_frankenstein]

LOL Still waiting on the pics Aj. I want to see what's going one in lost causes. LOL

I think I got a few for ya tonight.... just need to do aome re-sizing.

A.j.