can someone tell me stock fuel pressure reg size?
 

some say 2.5 some 3 bar and some 3.5

alot of vw guys would use porsche 944. reg to get 3.5 .

is n/a 8v same as turbo cars?

It depends, look here (https://www.paragon-products.com/Sea...x=0&Search.y=0).

NA/951 are 2.5bar, the S/S2 used 3.8bar

I thought it was 43psi 3 bar

+1

also found out turbo s is 3.5

From Porsche PET:

944 110 198 03 = Bosch # 0 280 160 227 = 2.5bar for ’86 to early ’89 Turbo

944 110 198 05 = Bosch # 0 280 160 286 = 2.5bar for ’89 – ’91 Turbo

My ’89 uses the early regulator with the barbed fuel line fitting. Later regulators have a threaded pressure fitting.

In general, the 3bar regulator is used with higher than stock boost.

Check Clarks Garage for more specifics.

No

Yes

what car used this?
3.5 bar fuel pressure regulator -Part # is Bosch # 0 280 160 263 -- Porsche Part #: 944 110 198 03

the S, S2, and 968 most likely

Dude, check the link I posted... '85.5 - '88 944N/A.;)

I have a 1987 924S and happen to have a spare NOS FPR which is Bosch # 0 280 160 263. It looks like it will fit the 924S but the original part is 0 280 160 227. As I understand this thread, the original on the car is a 2.5 Bar unit and this potential replacement is a 3.5 bar unit.

Will I do any harm if I introduce this? I'd just like to make use of spares I have :)

Thanks!

"I have a 1987 924S and happen to have a spare NOS FPRAs I understand this thread, the original on the car is a 2.5 Bar unit and this potential replacement is a 3.5 bar unit.

Will I do any harm if I introduce this? I'd just like to make use of spares I have :)"

If you use the 3.8 were it calls for a 2.5 you'll need to put koolaid in your radiator and fill your gas tank with a 50/50 mix of Cuervo Gold and Gumout. :)~

LOL :)

I actually think my SPARE is the correct part. I think the 1987 924S was supposed to have the 3.5 bar unit. These three sites seem to show the Porsche part # which translates to 944.110.198.03 or 05....

http://www.einmaligparts.com/Fuel-co...05_c_9421.html
https://www.rockauto.com/en/moreinfo...263316&jsn=368
http://dcautocatalog.com/illustration/index/480484416

Seeing that the FPR is now in the stratosphere price wise. I think I'll use my spare.

Complain really REALLY loudly if you disagree ;)

I just replaced the FPR in my 924S and the rating is 2.5 bar. But I'm curious to hear how a higher pressure FPR works on your '24. So if 3.8 Bars = 55.1143404399999923 Psi and
2.5 Bars = 36.2594345 Psi
and the FPR is vaccum operated,
would the higher rated FPR need more vaccum to operate it correctly? https://cimg2.ibsrv.net/gimg/rennlis...eedb339ee5.jpg
A fellow p-car owner posted this