Upgrading an S281SC - Page 2

mikebna · 10-26-2009, 01:07 PM

Quote:

Originally Posted by esanger

My suggestion would be to nix the mosaleen idler and buy a good tensioner. I bought the Roush and run the 3.2 and have never had any slippage issues (that I know of). I hear the Thumprr is a good unit, but pricey.

I agree, I did the same thing. But i ground off the roush letters and polished it before putting it on.

You may need a shorter belt as it has a smaller pulley on the p51 tensioner.

There is a huge diffence in the Tensioners as you can see here-->

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IWinULose · 10-26-2009, 01:12 PM

Thanks for the pics! You can definitley see the difference. I am going to look into the Rosuh piece if I can find the thing. Then I will have to figure out what size belt I am going to need to run.

mikebna · 10-26-2009, 01:24 PM

Quote:

Originally Posted by IWinULose

Thanks for the pics! You can definitley see the difference. I am going to look into the Rosuh piece if I can find the thing. Then I will have to figure out what size belt I am going to need to run.

I know you may find them cheaper from someone else, but i went through JDM for the P51 Tensioner because they knew exactly which belt would fit, now I have the part# and went and bought an extra belt just in case.

esanger · 10-26-2009, 02:50 PM

Duplicate as below. sorry.

esanger · 10-26-2009, 02:52 PM

When I purchased mine JDM was the only place to get them. If I recall correctly, I ordered it all at the same time (3.2 pulley, tensioner, belt etc..) Not sure if Jim made any corrections for the tensioner size or not..

S281 E · 10-27-2009, 09:16 AM

I got mine from JDM as well and had no issues. Of course it was more but they were the only ones offering it at the time.

06Saleen3V · 10-27-2009, 12:01 PM

A lot of incorrect information in this thread...
1st, a throttle body is a waste for your car right now
2nd, you are crazy to be running a 3.2 pulley without a GT500 system, and you need 60# with a 3.2" (I understand a lot of people run the 3.2 with the 39# injectors, but give JDM or any other saleen tuner a call and ask them, they will tell you the same thing I am.)
3rd, with those mods, your 3.2" pulley, and cams, say goodbye to your motor
4th, the "recalibration" needed for the throttle body means you WILL NEED A RETUNE

IWinULose · 10-27-2009, 12:01 PM

I've found it all over the net for $150. I will however give JDM a call towards the end of the week, and see if they can send me a belt out with the P51 tensioner so that I know I have the right size. Thanks for the tip guys.

Also, out of curiosity, has anyone ever had a forged bottom end installed and what was the cost?

IWinULose · 10-27-2009, 12:04 PM

Quote:

Originally Posted by 06Saleen3V

A lot of incorrect information in this thread...
1st, a throttle body is a waste for your car right now
2nd, you are crazy to be running a 3.2 pulley without a GT500 system, let alone 39# injectors
3rd, with those mods, your 3.2" pulley, and cams, say goodbye to your motor
4th, the "recalibration" needed for the throttle body means you WILL NEED A RETUNE

I have the GT500 fuel system, and 60lb injectors on the list. Mind you, the car is bone stock, I just have a very fast closet. So, with all those mods, the car can't be tuned safely?

EDIT: By the way, I DO have 39lb injectors now, but wanted to go to 60s when I started installing everything.

06Saleen3V · 10-27-2009, 12:10 PM

Quote:

Originally Posted by 06Saleen E

Incorrect. It does not reffer to tuning, but to calibration. You have to adjust the Voltage on the TPS for that TB. You have to measure the voltage of your existing TB TPS and record it, then when you put the new TB on and you need to adjust the TPS to match the Voltage to the new TB. You'd need a voltimeter for that.

Hope that clarifies.

This is incorrect. Anytime you modify the car to bring in more fuel or more air, you need a retune, especially at the power level he is at. While it may be true that you need to adjust the voltage, you also need to adjust the tune.