What power would you expect...!

[os951]

Those mirrors were a group buy to Finland/Sweden (30 pairs).
I have taken molds off them, but i am not sure am i willing to fabricate them. They have to made from 5- different piece, so it's time consuming. They were electric ones

Some of these 30 pairs

Mirrors installed into friends ex. 951. Front splitter is own production.

 

[u63af]

That 951 looks amazing in black. I was planning on getting my turbo modified by turbotechnics in the uk they seem to be able to put different compressor wheels along with new shaft and 360 deg bearings. I do not know much about the science of turbos but has anyone had their exisitn turbo uprated I think mine is a 26/8

 

[edh]

ORIGINAL: u63af

That 951 looks amazing in black. I was planning on getting my turbo modified by turbotechnics in the uk they seem to be able to put different compressor wheels along with new shaft and 360 deg bearings. I do not know much about the science of turbos but has anyone had their exisitn turbo uprated I think mine is a 26/8

Have a chat with SimonP before you do this - his Garret BB hybrid sounds like the one to go for [] - although it's not cheap once you've added in the engine management changes you need (same for any uprated turbo)

 

[996dom]

Thanks for all the replies, I went for the Turbo because I got it at a good price secondhand, it was reconditioned by Turbo Technics who seemed happy enought with the construction of the turbo. Also I spoke to Promax who said it was a decent Turbo for my needs, my 944T is a cheap track day car.

I collected the car today and TBH it does drive pretty well, boosting up to 1.2bar and dropping off to 1.1, it spolls up slightly quicker and certainly pulls stronger than previously. The car produced 328bhp/320lb/ft on Bob Watsons rollers.

I guess i was expecting slighly higher figures for the equipment I added, but as always it never that simple.

Cheers

 

[edh]

That sounds more like the figures people were expecting - re-reading your original post, you were getting 280 before you fitted the LR turbo.

You could always get more bhp by trying another RR []

 

[944 man]

The mirrors interested me too.

 

[Suffolk944]

Those mirrors do look good....as do those wheels...as does the car !

 

[Diver944]

I think those figures are virtually spot on for your mods with a healthy engine []

If your head gasket was fresh and your AFR figures are slightly rich around the 11:1 area at full boost, then you could possibly raise the boost a little and still be safe. If you are leaner than 12:1 then best to keep it safe and promote longevity.

 

[TTM]

Dom, does the 3" exhaust also include the 3" downpipe?

 

[os951]

If your head gasket was fresh and your AFR figures are slightly rich around the 11:1 area at full boost, then you could possibly raise the boost a little and still be safe. If you are leaner than 12:1 then best to keep it safe and promote longevity.

Beside that you should also check out the back pressure your charger produces. Too much of it might be fatal.

 

[333pg333]

I would agree with os951 / Mr S, in that a lot of the thinking on mods for our cars is outdated. I believe this is partly due to the fact that in many countries these cars are cheap and a lot of younger or not so well off people can afford to buy them, but they can't afford to upgrade them. Of course this is a generalisation, but by and large up until recently there were very few cars with anything but bolt on old tech products. Obviously our cars are long forgotten in general terms and don't carry any market force, so it's up to other enthusiasts to design and build upgrades.
The Holsett turbo looks good (especially the twin scroll) and I also like the look of the new Borg Warner units with their 'Extended Tip Technology'. This was my choice of turbo for the new incoming motor. There seems to have been some issues with the Garrett dbb product in terms of reliability from what I've read.

In terms of dyno reads, we have seen large disparity from dyno to dyno and especially country to country. It's very hard to compare. 996dom, what year model is your car and what boost levels have you been dyno'd at? What gear? Eg if your car is an '86 and the dyno figure read 285bhp with essentially some chips and an exhaust, then you've done well. I'm not sure what are the contents on the Promax 2 kit though. Stock turbo? Do you have a wideband as well?

 

[u63af]

Edh,
What changes do I need to do to my engine management to put a hybrid turbo on. I have got promax chips at the moment. I knew that buying this car was a bad idea. The reason I sold my tvr was to save money but I am already getting the 944 turbo tuning disease. This month have bought promax chips, tial dpw, magnecor leads, greddy profec, 3 bar fpr. I can see myelf buying a hayward and scott system soon aswell.

 

[edh]

I'm afraid there's no cure [] - you're already beyond saving....

As I understand it the 944 engine management is running a fixed map at WOT. At WOT the AFM will have maxed out & the ECU gets a full 5V signal from it. The ECU therefore doesn't actually know how much air is flowing & relies on a pre-determined set of values. This will vary according to boost levels & turbocharger. You may be lucky & find the AFR is still OK with different turbos, but to optimise performance (and keep things safe) you should probably have a motronic chip that is configured for your particular setup, or get one custom mapped for you.

I'm assuming you're running AFM? although this applies to MAF as well. I have a Vitesse MAF setup, and have been investigating turbo swaps. Even with MAF, John @ Vitesse has recommended that I install the piggyback kit & wideband to get a more accurate tune. He said "It may be OK, but an engine rebuild is much more expensive than a PB & Wideband"

It might be useful to post the RR chart

 

[TTM]

As I understand it, the base fuel map in the Vitesse chipboard will work with the engine it was specified for (engine displacement, compression ratio, camshaft, injector size, etc) regardless of the turbo used. The piggyback allows for fine tuning the AFR in function of load and revs, which is rather useful as it's unlikely two engine will behave exactly the same under wide open throttle, because of variations on quality of the fuel used, on the efficiency of the water/oil cooling system and on the overall condition of the engine (oil consumption, etc).

Is this correct?

 

[DivineE]

ORIGINAL: os951

What i try to say here is:

-Be innovative
-Do not be afraid of making mistakes, study you car and learn to fix/update it
-Discuss with other 951 owners who have already been there, they can give you a lot of advice
-Do not get blinded by fancy american websites. They are not offering the absolute truth
-Check out also other brand turbo cars. You can copy most good solutions also to 951
-Unite with other 951 owners.As a group you can help each other and also get parts cheaper

I have been with 944's over ten years. I have owned my 951 ten years, before 944's i was involved to 911's. I usually get ~10 mails daily from younger 951/S2/944 owners concerning all kind of tecnical issues. i am happy to help these younger persons to learn their car better.

LOVE you attitude and your knowledge. You would get on very well with George from this forum I think! You both think alike. Keep up the good work.

 

[edh]

ORIGINAL: TTM

As I understand it, the base fuel map in the Vitesse chipboard will work with the engine it was specified for (engine displacement, compression ratio, camshaft, injector size, etc) regardless of the turbo used. The piggyback allows for fine tuning the AFR in function of load and revs, which is rather useful as it's unlikely two engine will behave exactly the same under wide open throttle, because of variations on quality of the fuel used, on the efficiency of the water/oil cooling system and on the overall condition of the engine (oil consumption, etc).

Is this correct?

I think so, yes. And the MAF doesn't max out, so your're a;ways getting an accurate picture of air flow. I can certainly run different boost levels with the MAF (up to a point) & I could probably run a different turbo without the PB, but I can see why John wouldn't warrant or advise it.

 

[996dom]

My car is a 1988 Silver Rose and is running 1.2bar, it had a brand new wide fire head gasket fitted and had very impressive read outs on the leak down test.

The car is running a brand new standard AFM and was remapped by Mehnea who is a very good mapper. I wasn't around when the car was mapped which is a bit of a pain, as I would of preferred the car to be mapped on the road.

I am pretty happy with the cars performance, expecially after reading all the about posts, but I'm sure I will crave a bit more grunt once I've done a few trackdays. This time I think I'll ask first before I buy!

 

[TTM]

Good to see I seem to have got right how the Vitesse MAF works.

edh, how far have you been in your search for another turbo?

 

[u63af]

I appreciate that there is no poin in having this many turbos but it would look good.

http://forums.beyond.ca/showthread/t-64053.html

 

[edh]

ORIGINAL: TTM

Good to see I seem to have got right how the Vitesse MAF works.

edh, how far have you been in your search for another turbo?

not far - Simon Peckham's hybrid turbo - using a Garret BB technology looks pretty good to me, but will end up costing nearly £3k once you add in the extra Vitesse kit and fitting costs. I need to save up some cash & stop breaking things....