Dutt neck gains???

[TT/Ameasap]

After installing the 2.5 neck, how much boost with no KR could you get? Im trying to work my way up to 20psi on 93 oct. 0.0 KR on current set up.....

 

[azgn]

a worthy goal for sure, but you will be replacing head gaskets (or worse) trying to run that kind of boost UNLESS you have a chip designed for such antics (meaning reduced timing, et al)

proceed with caution

 

[UNGN]

I would think the Duttweiler neck has very little to do with knock. Adding the neck will increase the boost about 1.5-2 psi, which in itself will increase knock. I would guess it will knock at very similar levels of boost (If it knocks without the neck it will knock more with the neck)

 

[TT/Ameasap]

AZGN, this is a TTA we are talking about ...16.5 psi stock Thrasher chip is what 18 deg. timing. I can run 18 psi with this chip on 93 oct. Just added Power plate and was thinking I may get an addtional 1 psi or 2 ... I dunno???


UNGN, I thought that with the added volume of air from the modification that it would be cooler air reducing KR. I havent done alot of research on this so I just posted it.

 

[azgn]

oh, excuse me, a TTA eh? actually stock boost was 15 and the gas they had in 1989 was a hell of a lot better than you can buy now....

a Dutt neck will improve air flow, lower charge air temp and will cause you to lean out sooner, thus more knock at lower boost (of course you will be making more power at that lower boost level....)

18* of timing will help, but 20 lbs is a lot to ask of 93 octane

good luck!

ps put some race gas in and go fast!

 

[Mease Performance]

alky brother!

put a honkin turbo on that baby, decent injector, extender, the alky.....and watch the bird fly.

<KM@>MPE

http://www.measeperformance.com

 

[TT/Ameasap]

This bird flys already!

I run 17 psi now and can run 18 psi on current combo. Are you guys saying I cant get 20 PSI out of it on 93 oct. with a little mod? Maybe I will hit the TTA section.

Thanks
Bo

 

[azgn]

how fast does the bird fly?

have you had it to the track?

more boost does not necessarily = more power..........

 

[TT/Ameasap]

My car is a daily driver with 74K on the clock. Soon I will put it in the garage and go to town on it mod wise keeping the stock parts.

Never ran it at the track but its fast enough for a DD. G- tech said 291 rwhp . I just set a goal tonight and want to accomplish it some way or another (cheap). Later on I have some plans for it.


Shoot me an e-mail if you think of anything I can do (cheap) to get me there.

Thanks,
Bo

 

[azgn]

better gas or alchy.........

 

[Mease Performance]

intercooler

13-row intercooler, or alky....

 

[blackbuick87]

If you are dead set on pump gas and no alky pull the heads and intake and send them out to have them ported.

Get a bigger cam for less cylinder pressure down low

Get the dutt neck, or better yet a V4 (do they fit TTA's?)

Pray to God

Seriously dont set yourself at a certain boost level, that is not a good way to measure performance. With the porting and cam work I listed you will get big HP at relatively low boost levels.

 

[TT/Ameasap]

Blackbuick87, I am not set on this goal Im just trying to get as close as I can to the 20 psi mark and go from there with alky later. I am dead set on alky though I need other non-car related things first.

So the Dutt neck would increase boost as well as efficiency?

 

[RobR]

Stock boost for a TTA was 16.5. And the gas was a lot better as stated above in 89. Better then todays gas that I couldn't even run the stock chip and stock boost levels without some retard. Too much timing...

 

[Two Lane]

Another worthy goal might be to strive for more HP/torque at the LOWEST boost possible, like many of the above suggestions would help you to do.

The higher the boost, especially on a stock block bottom-end, the higher the "POP!!-factor".

HTH

 

[YGETV8]

Hi Bo,

How's things down there where it's WARM?!

I found that I couldn't run as much boost after the install of the 2.5" IC neck on my old GN. Don't get me wrong, I really feel it helped that stock beast get 111.97 mph 1/4s! But I could only run about 16psi after, whereas I was able to run 17-17.5 prior. Same chip the whole time, of course. Quicker spool was noticeable after install, too.

Yes... ALKY it!

 

[Joe 1320]

All you are doing by opening up the IC is increasing the flow. This does not increase the effeciency of the IC, it simply allows more air to pass though it. As was explained earlier, the increase flow of air, if no additional fuel added, will cause a leaner mixture. Think about it

You would however, be able to reduce the wastegate setting and make the same power with less pressure due to more air flow. If you are determined to run more boost, you WILL have to either reduce timing, run more fuel and/or higher octane. You cannot run the engine on air alone. Some cars might be producing 22 psi and trying to ram it though a restrictive opening and the motor only sees 15 psi at the intake valve. Others can produce 19 psi and due to total flow may be 18 psi at the valve. I'll take the second example any day as long as there is enough fuel/octane to prevent detonation.

 

[bob86gn]

The only plus to useing the Dutt neck is that you need to make less boost to accomodate the rpessure drop through the intercooler so there is less ehat to reject. If you keep the airfloe the same it wil be cooler becuase there is less ehat of compresson. 20PSI on 93 without alchy or very low timing may not possible.

 

[TT/Ameasap]

Originally posted by Joe 1320
All you are doing by opening up the IC is increasing the flow. This does not increase the effeciency of the IC, it simply allows more air to pass though it. As was explained earlier, the increase flow of air, if no additional fuel added, will cause a leaner mixture. Think about it

You would however, be able to reduce the wastegate setting and make the same power with less pressure due to more air flow. If you are determined to run more boost, you WILL have to either reduce timing, run more fuel and/or higher octane. You cannot run the engine on air alone. Some cars might be producing 22 psi and trying to ram it though a restrictive opening and the motor only sees 15 psi at the intake valve. Others can produce 19 psi and due to total flow may be 18 psi at the valve. I'll take the second example any day as long as there is enough fuel/octane to prevent detonation.

I mean the effeciency of the turbo Sorry not to clearify.
I did a little tuning yesterday and got 18 psi 0.0 Kr but every once in a while I would get a stutter @WOT and at 1500-1700 RPM when hot only. I think I need a coil pack and modual what do you guys think? Otherwise, still running strong. The PP seems like it did a good job so far.

 

[BobbyBuick]

I have my gn set on 19-20 psi all the time on the street thrasher 93 chip blue tops and a te44 with cas IC never get knock .never had the engine out .maybe the chip .that car hardly ever knocked .one time i for got to turn the boost back down from 24
after coming back from the track a couple years ago and nailed it on the street with my thrasher chip and she knocked pretty goood in 3rd .I looked down OHH SHIIaaaatttt. still got lucky