Doward, how is the project coming along? sorry for not b eing able to buy the turbo kit, i really wanted it , but engagement to the missus: 1500, first and last months rent on new house:2400, new computer for the missus for school and her business:2200, complete msd ignition:300, not being able to afford the one big mod i wanted for "badbird" that she really deserved for services above and beyond the call of duty: priceless and sad , but either way at least if the throotle body and intake are priced under 40-0 i could afford them when they come out, i still support the turbo project and only wish u had the time and money to mass produce them or sell the patent to a bigger company, the only problem there is that they will make the price mark up huge!! it is a great idea and it puts our v6's in a higher hp bracket to the point of the 2.8 not being a motor laughed at and made fun of. if i had gotten the kit i already had my license plate picked ouit for the car "ietz28s. well doward in closing ,great job and keep up the good work man, smoke'em if u got the hp, dazzle 'em with b.s. if u don't lol

 

I'm waiting for them too.

 

Well, until I get the turbo GP done, I don't want to overload my plate, now do I?

I've got them both planned out - I have to get the materials, and build 'em, but they are coming.

 

Would bigger throttle bodies even benefit our measly v6's?

 

With the combination of a larger plenum, oh yes!! Out V6s were designed for higher RPM power, and our stock intake/exhaust manifolds are KILLING the power.

 

You plan on making the intake manifolds also?

 

Mines ready to go other than needing that Automatic tranmission linkage for the TB. I had somebody e-mail me saying they were going to send me one. I gave him my address and asked him to give me his so I could shoot him a check to cover shipping and I never heard back from him?

 

By the number a 2.8 is a 14000 rpm motor.
only 1 motor has a better bore to stroke ratio.

4cyl iron duke.

though 7-10000 would be cool enough.

 

give me a pm, I'll ship the whole tb if you want. I have two of them even.

 

when u say your making a intake/throttle body your talking about the intake manifold/runners/plenum right not air intake.

 

They are cold air intake and throttle body kits.

 

anybody make plenums?

 

i thought he was making a homemade plenum. there goes my dreams of having a fast 3.1. no need for a tb then if i cant get a plenum

 

Exactly what I wanted to know.Doward,will you be making plenums? No point in big TB's with stock plenums

 

i think by intake he means the plenum not air intake why would he make a tb and no plenum?

 

He stated in his Turbo thread that they were "Cold Air Intake and Thorttle Body" kits.

 

that sucks i made a homemade cai for my car already. I want a 15 second v6 or faster and it's looking more impossible everyday
Im only 15 dont have money for a turbo but i can afford everything else

 

This was his reply for the us being poor and not buying the turbo


You should definatly get a underdrive pulley if you want a little bit more power.

 

u got a screenname or something we got like the same mods and car and i have some questions about the car and the only way i can communicate is by posting and hoping youll respond lol

 

AIM-PanzerfaustAttak
Email-Gopedvxwar@yahoo.com

 

You mean something along these lines? Gotta make it homemade.

 

doward means a plenum/manifold. not a CAI. i am also building a plenum to go with me big TB.

 

Wow... talk about out of context. I said I'd PRODUCE these, if there was some desire for them. What would be the point in making 5-10 of them, if nobody wants them?


Not a CAI.

It's a 60V6 Upper Plenum Chamber + 62mm Throttle Body

 

NICCCEEEE....

 

Would the computer need to be modified or reprogrammed for your Plenum/TB?

Any other modifications needed for it to work correctly?

 

Computer will work fine, stock - but there'll be some untapped power in there

Nope, it'll work with the stock stuff

 

how much hp did u gain with the plenum/throttle body? and im guessing u had the runners polished (best looking 60degreev6 I have ever seen)

 

if you plan on spending money, id say you can find more "bang for your buck" than an underdrive pulley at first. $50 is a bit much for 2hp. you can spend less and get more if you havent done any mods, or very little yet. such as, 180 t-stat, plug wires, TomP's tune up(which would be more, but should come before any of this anyway), coolant t-body bypass (which is debatable and not recommended in certain climates). i think your money could go for more important things than an underdrive pulley, ignition coil, or any of that stuff. get a catback, headers, TomP's tune up, roller rockers (t-stat while youre doing this is recommended), or find a dual snorkel setup at a junk yard. those breathe so well for our V6s. that means finding a dual snorkel setup at a junkyard or ebay. then gut it to really open it up. totally free to gut it and youll notice more at top end than a K&N would.

 

Hey Doward,how about the addition of a throttle body spacer to the plenum/TB combo?

 

please tell me when u find out how much hp and torque will increase with the 62mm tb/ plenum

 

Im guessing 15-20.

 

By itself? Maybe 4-5rwhp.

IN combo with a better cam, and headers? Yeah, then 15-20hp over stock.

We'll find out, with Am91's setup

 

Ohh...opps..I'd thought it be a bit more...

 

I has not been driven on yet. I am awaitng the arrival of an Auto trans TB linkage so I can run the tranny TV cable. Anyday now I will be testing it.

I will be doing three tests with it progressively.
1) Just the 62mm TB on a ported stock plenum.
2)62mm + custom plenum shown above.
3) the addition of headers with stock TB and stock Plenum. Once I can get around to ordering the exhaust piping I need to finally install my now "legal" headers, I will finally install them. I have some major work I am doing to my house right now and have it pretty torn up for the next few months, but after that, I'd really like to find time and finally get these headers welded into placed.
4) Repeat 1 or 2 ( #2 if custom plenum works much better on stock engine testing)

 

we should get some ideas with my new setup... i was planning to get some new track numbers tonight but it rained ALL day!!!! i have my new 'setup' on the car and have been driving it but i can't tell much with all of the roads being wet

 

I am now ready to go thanks to a member sending me the correct linkage I need. I actually am working today, but am going to try and get it on there tonight and test it. Wife needs the car tomorrow so I have to get adequate time to tinker with it. I 'll keep everyone posted when this happens.

 

Sitting atop the other stock plenum and stock 52mm TB

 

The mouth of the 2nd stock plenum is ported to try and match the 62mm TB as close as possible. Not alot of meat there.

 

5:20pm here in So. Cal and I just got back from a test drive.

The 62mm TB is on and I am happy to report a noticable sustantial improvement on topend. I would guess a modest 5hp up top. There is absolutely no difference in feel up to 4200rpms, but at 4200 it now has a noticible bump like it enters a powerband and the revs will climb a little quicker to about 5400 then drop off on power. It would reach 5400 before with the stock TB but it would take a tad longer to climb to that rpm and felt like it struggled a little, now it doesn't.

This is on a fairly stock 2.8 motor that is fresh with only 38k on it. Roller tip 1.52 rockers, and the stock exhaust manifolds and y-pipe. next will be the headers within a few weeks I hope- its time, not money- I have the headers. You guys have to also remember I have a carbon fiber driveshaft that allows this motor to rev higher in gear freely also than it did with the steel shaft. So I have three points that aren't stock and make it show more power up top 1) Rollertip rocker 2) lightweight drivetrain/rotation mass, and 3) the TB. All three showed the same noticable improvements about equally. I am certain now that the headers addition will really show a gain with the 3 above making power above 4500.

It is also catching 1st to 2nd rubber which it has never done at about 5400rpms out of 1st.(Before you make claims that your car will do that stock, remember this is a 2.8 auto with a very radical suspension and very grippy tires+ auburn RR posi. If I put the stock 15" factory wheel and tires + open diff on this car it would do it without any motor mods no problem)

 

that's cool, dean! i'm glad to hear that you finally got to test out your new TB. i love the power increase from my 65mm! i know that a little tire spin on a shift means some power on your car! ...knowing what kind of suspension and all you have! do you have any plans for installing your new plenum yet?

 

Alan, I drove it again later last night when it was cold and there was definately a noticable increase. I hopped on the freeway and ran it up and it really felt good. I want to change what I said above about no difference under 4200, On the freeway matching speed with everone else at about 70mph (2950rpms in D) and floored it it had much better torque and passing power to overcome a car sitting next to me at that rpm level.

I am only wondering now if I am running out fuel pressure again and going lean at WOT like I was before. I have a strong feeling I am. Time for a good adjustable fuel pressure regulator and a gauge.

The new plenum has three pinhole leaks in it. My aluminum welding capabilities with my MIG welder is not the greatest to be using but it got me this far (Lots of splatter to clean up afterwards) and is very porous welds. I have a kid friend that TIG's that I am going to give it to so he can run a good TIG bead around the top chamber seal to insure no leaks, then I will grind it clean and smooth again for the 18th time for a show appearance. But yes this will be next to test the custom plenum. I know my stock "T" connection y-pipe is killing my flow up top.

EDIT 3/29/05: I just ordered a Holley AFPRegulator 35-65psi to try and bump up the fuel pressure some more to see if any more gain.