samana76

Thank you Tom M'Guinn once again.
I just printed and brought the step-by-step procedure outlined in Clark's Garage to the exhaust guy and he was enthusiastic. It was exactly what he was looking for. That site is a godsend.

Regarding the additional upgrades I think I will just go with the Tial wastegate at this time. I'm already spending much more than I expected and the stock turbo is in tip-top condition. I think the other upgrades, like the MAF, can be easily done at a later time. There are various versions of the Tial wastegate, what would you recommend? I think I can put up to about $300 into this upgrade.

You guys are great and are a big help. Thank you!

User 52121

Pulling the turbo sucks, plain and simple. If he hadn't already taken the top of the motor apart, I'd say skip the downpipe and just install the rest of the exhaust (assuming it'll bolt up to a stock downpipe) and save the turbo removal for the day when you want to install a bigger turbo

As everyone has suggested, Clark's Garage is your go-to point. There are 3 bolts/nuts holding the turbo down once you disconnect the exhaust, oil, and coolant fittings. Two underneath the mount (hex heads, be careful, don't strip them) and one where the stock downpipe bolts to the side of the block. Get those 3 out and the turbo should come up and out.

odb812

There is a 3" cat bypass for stock downpipe and the "true" 3" cat bypass to be used with the 3" downpipe. They each have different flanges.

samana76

Hi odb812,

Yes, I'm going with Trackmasters. I'm quite excited as it's my first time at Laguna Seca and my first time on a track with the 951S. I was sort of thinking of getting an instructor. Have you had any personal experience with an instructor there? Do you have any suggestions? Also do you how much it would cost? Just to have an idea.
Thanks.

odb812

I'm not sure how trackmasters does their instructor program, I've only done the intermediate and mixed groups with them. I'd email Doug about it, but there will be plenty of qualified drivers there to help you out. I don't think it will cost any more so long as they have a program. I always suggest getting an instructor for your first day at a particular track. Look out for a guy named Tim in a purple 996 turbo cab. He's a great guy, very fast, and full of good advise.

samana76

Hello Everyone again.

This evening I finally picked up the car with the new complete exhaust system installed and the bung sensor welded onto the test pipe. I had ordered and received a new Tial 38mm kit from Pauertuning, but there was a problem in the installation, therefore I won't have it installed until next week. So tomorrow I'm going to Laguna Seca with the factory wastegate installed.
Thank you all for your help and advise.

I have another question. The Fabspeed exhaust sounds nice but there is an very audible whooshing sound in the cockpit (don't know if it's audible outside as well) when the turbo spools up, which was not there before. Is this sound normal with this setup? I can't say I'm crazy about it, but I guess I can get used to it if it is indeed part of this setup. Also, for now at least (I've driven the car only half an hour on the freeway with traffic), I don't feel that big of a gain in performance from the 3" exhaust. Maybe when I get the Tial wastegate installed I'll notice an additional bump in performance, or maybe I simply didn't have the right conditions to test it yet. I'll have a much better idea tomorrow on the track.
In any case any input regarding that whooshing sound is appreciated. I'll try to record it and post a sound bite here tomorrow evening, but it is clearly the sound of the turbo spooling. I'm just curios to know if this sound is normal with a complete 3" exhaust with cat-delete or if I should check into it.
Thanks again in advance.

URG8RB8

Congrats on completing the install, but a bit puzzled by some of your statements. What other mods have you installed in your car? Do you have a boost controller? I am hoping you did not assume by adding a nice exhaust you would have a huge increase in power output. If so please search for Paully's great recent post about how to properly mod a 951 and in what order with many options. As soon as you install the wastegate, new turbo, MBC and then install the complete M-tune kit with injectors you will be good to go as far as HP! Then you will need a new clutch and finally suspension if you are planning to run seriously at Leguna Seca. I have a place up in Milpitas but won't return until January. We can hook up when I get back. Good luck.

BTW: After switching to MAF whoosh noise on spool is quite normal, but not before.

John@Fabspeed

Hi Samana, its Alex from Fabspeed. I'm sorry to hear about the issues you ran into with the installation of your system. First I want to thank everyone here for the great information and feedback to help him install his exhaust. I'm glad you got it all figured out and it came together nicely. The system can be difficult to install if someone has not done it before and I apologize for not having step by step instructions for this. We have instructions for most our products but this is one that we are working on now. So we will have it finished in the next week or so, which will show everything step by step with pictures. I hope you are enjoying the Fabspeed exhaust sound and power increase, and let me know if you ever need anything else.
Thanks,
Alex

numbskull

Was the whooshing occurring right off boost, was there a MAF upgrade to replace the barn door stock unit? Glad the install went along I like the system a lot been using for a few years with race cat and slip on test pipe is easy to deal with.

samana76

Hello Alex, Hi numbskull, Hi URG8RB8

Thank you for your messages and sorry for answering so late...it's been a very busy Christmas season. Finally I was able to get my 951s back today after the Pauer Tuning TiAL 38mm wastegate has been installed. It's been two months since I last used the car and I am very impressed with it now that the wastegate has been upgraded. I am having a few issues with the boost now, which I will be writing in a different post. In any case I am very satisfied with the Fabspeed exhaust and the customer service they have provided. The sound if very nice, the power, now with the upgraded wastegate, is phenomenal. It has that whooshing sound, which I'm not to crazy about but can get used to, starting at 2000 rpm roughly, as the turbo begins to spool up and, now after the wastegate upgrade, pegs at 2 bar turbo at just about 3200 rpm. I'm really impressed (and scared .
At the time, had I known it would have been such a elaborate process to install the down pipe, and therefore costly process, I probably would have opted to do that at a later time and would have gone for the straight pipe and Maxflo Muffler only. However, now that it is done and paid for, I am really happy I did the complete 3" Performance Package install.
Thank you all for all your help. Now on to my new problem of the turbo "popping" when I floor it for a few seconds and the boost needle is pegged at 2 bars and the engine touches 4-5k rpm. I'll go write that on a new post though.
Thank you again all.

URG8RB8

Hello!

I seriously hope you are joking about 2 bar reading on boost gauge, if not stop driving your car immediately or you won't have an engine much longer. Please list all mods you have made to your car. 2-Bar is over 31 psi, nobody runs boost like that on 951.

aglaes

I think he's talking about 2 bar absolute - ie the gage in the stock instrument panel is 0-2 bar absolute.

numbskull

It's probably a good idea to install a boost gauge for a proper reading considering adding a new WG.

samana76

Hello again. Thank you for your comments and suggestions once again. Indeed I am talking about 2 bars absolute - the stock dashboard gauge reading (what would that translate to in PSI?). I'll look into installing a proper boost gauge. Any suggestions?
Also, in the other post I wrote about the turbo "popping" (see thread here: https://rennlist.com/forums/944-turb...g-problem.html ) other members are suggesting that I am hitting the overboost protection. Any suggestions on how I can avoid this? If so, I would appreciate if you could write on the other post as it is specific to that problem and I wouldn't want to discuss the same topic on two different threads.
Thanks for all your help.

URG8RB8

Yes, install a proper boost gauge. See write up on LR website. I would just buy everything from there, they are good people and price is reasonable. Make things easy and get their MBC, gauge, and panel to mount everything right below your radio. Not much money involved. Do you have MAF kit yet? If not do your homework and then give Josh a call at Rogue Tuning for his complete kit. Then you are almost done. Oops, forgot whether or not you installed a new turbo with the FS downpipe. If not, still a little more work to do. Probably going to need a new clutch to go with all that new power as well. If you want to run E-85 going to need an 044 fuel pump as well. List keeps growing... Welcome to the club!

1 bar is approximately 1 atmosphere or 14.7 psi, but actually 14.51 psi can't remember why.