fast951

Few weeks ago I got some feedback from the 951 community regarding what they would like to see as performance upgrades, mainly for street cars.
This past weekend, I had a chance to dyno/tune a 951 that uses our stage 1 turbo, maf and piggyback system.

The car is a 1988 has 120K miles on it, the head was rebuilt to stock spec and Oringed. A wide fire ring headgasket was used. The car has a dual port WG and a MBC. 55# injectors & a adjustable FPR was on the car as well. I believe the above mods are already installed on many 951s (except for the 55# injectors). So our kits include the Turbo, MAF, Chips and PiggyBack.

The car needed some TLC. Vacuum lines are very old, the plug wires are not in the best shape. The blow off valve is opening under boost. Under normal circumstances I wouldn't dyno the car as is, but the owner drove from out of town, so we went for it anyway.

The upgrades we provided are: Stage 1 turbo, MAF with chips for 55# injectors and a PiggyBack system.

The results were as follows:

- At 16psi boost we got over 320rwhp. Very nice and flat torque curve. This is on 93oct gas.
- At 20psi boost we got 369rwhp. I think there is more there, but we stopped the test as boost was not steady and flat. I think the blowoff valve was letting go.

Full boost was around 3400-3500rpm. Both curves were very flat (no peaks then huge drops).
The A/F was nicely adjusted by the PiggyBack to match the car.

I will let the car's owner shine in. And I'll leave it up to him to post any dyno charts.

I have developed and used a Stage II kit, which uses a larger turbo, 55# injectors, MAF, custom chips. The stage II will produce around 410-430rwhp.

I'm in the process of tuning a stage II which should make 450rwhp...

The nice thing is that Turbo, MAF, chips, Piggy Back are less than $2500 for the Stage II. Stage II & III are few hundreds more.
The Turbos are water & oil cooled and bolt to the the 951 exhaust. All hoses and harnesses are supplied to make the install as straight forward as possible. The PiggyBack allows you to store multiplt map files that can be switched on the fly (Hi/Low boost settings?).... And it can data log your A/F ratio...

fast951

A quick note. The boost was set for 15psi and 19psi, however it spiked to 16 & 20, so that's why I used the 16 & 20 vs 15 & 19.
Once all minor problems are addressed on the car we will dyno it again. I feel that the above numbers are on the low side..

ian

Those are some impressive numbers,

my question again is, do you think you can get similar results from a MAP kit and your turbo, or is there something else at play here?

For example, I have a MAP, K27/6, 55# injectors, tial 35mm, test pipe, etc, do you think the swap of turbos would yield a significant improvement, or would I have to scrap the MAP kit?

Ski

Pictures, pictures....or is the website up yet.

fast951

Well, I need to know which turbo you have first. The way I see it is that in order to make good reliable HP you have to address the Hardware (Turbo, exhasut,...) and the software to manage your hardware.
I personally have not used the Map kit, so I cannot comment on it. I have used a stand alone system that uses MAP sensing (MOTEC) on a 951. I personally don't care much for the MAP sensor, but that's my opinion.

I know what the kits (software & hardware) can perform. It's a matching system that was designed to work together. Sure you can use pieces with other systems but you as the end user will end up stuck with figuring out the tuning and resolving all mismatches.

fast951

Ian,

Regarding your turbo. I just wanted to clarify my previous message. There are many K27 compressors used. That's why I wanted to know which turbo you had.
I have used a K27#8 (7200 series K27). Nice unit but could never get as much HP out of it as I liked. The #6 hot housing is very restrictive. Once you start turning up the boost the back pressure gets really high...

ian

It is a k27 with a #6 hot side....

I know it is not the greatest turbo, and it is something I do want to upgrade on my car, it came with the car, and i'm not wild about it, but i'm looking to find the best option for my car.

Street / track hopefully not a daily driver for too much longer....

fast951

Ian,

The stage I kit is mainly for street/track use where full boost comes on before 3500rpm.
For track use it's a different game as you want your power a bit higher on the RPM range 3500+rpm, that's where you spend most of the time on the track.
If you like additional info, please email me directly.

Thanks

*eurospeed951*

ok, you have my interest, but I need to know more details. What turbos are you useing in your kits and what piggyback system are you useing? How is it all adjusted?

fast951

I'm sure you understand if I will not be able to give full specs on the turbo etc... It took a long time to come up with a good combination.
All Turbos are bolt in with Oil & Water connections. The internals are custom to Vitesse specs.
The PiggyBack is tuned with a Laptop and a windows (or DOS) based programs. Very flexible, you are able to modify 128 cells based on Load & RPM.

shaheed

john, the 15psi run sounds like what i am looking for. if you're going to be dyno tuning anytime soon i'd love to have a look.

*eurospeed951*

Ok, well my setup is listed below in my sig. With your turbo, injectors, and piggyback do you think you can get me to 400rwhp for under 3k, with a flat A/F ratio at around 17 to 18 psi? Also do you have a website?

BoostGuy951

Vitesse? You have got to be kidding me. Vitesse Performance is the name of my car club and what has become a small Speed business. "VITESSE" is even my liscence plate. Man I thought I was being original.

Ski

bump on the pics again. When are you going to have the website up that was supposed to be up last year. John I would like to look at something other than that picture you ran on rennlist about a year and half ago; it was barely in focus.

Turbo - base of what - keep your compressor and trim private
MAF - Autothority - Pro Flow?
Piggyback - variation of UNICHIP?

Puppan

Fast951:

If I understand it correctly you don´t have an webpage with your services and products??

If it´s possible can you send me a pricelist with your products and shipping costs to Europe?!

peter.eriksson@techdata.nu
or
puppan@bredband.net

I´m especially interested in the differnt turbo setups.

Regards
Peter