aporschefan
PCGB Member
my wheel sizes are 7.5 front and 9.55 rears.
This is the front wheel...
This is the front wheel...
which tyres and tyre pressure queries
- Thread starter aporschefan
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aporschefan
PCGB Member
And here's a picture of the reading on the rear wheel. Sorry about the lame pictures.
Pictures are fine - you have 7" and 9" rims, the other number is the offset in mm (how far the mounting is from the centreline of the wheel).
Standard width rims for late Turbo, possibly optional on S2s,
Oli - the 2.7 could be had with 195/65 15 all round, but I'm not sure 15s would clear your brakes! Id stick with the 205/55 225/50 combo.
Standard width rims for late Turbo, possibly optional on S2s,
Oli - the 2.7 could be had with 195/65 15 all round, but I'm not sure 15s would clear your brakes! Id stick with the 205/55 225/50 combo.
somewhere between 32 and 36, you can draw a chalk line across and see how it wears, centres - too high edges too low.
I have a set of ex 911 wheels front 7, 205 rear 9 255, doesn't really affect it noticeably on the road, on track more understeery than I would like, usually over inflate the rears slightly to compensate a bit and trail brake more. Buying used track day tyres from 911 owners is cheaper than buying new tyres though - they cant use them once they are no longer road legal without a lot of hassle - they fit in the boot of a 944.
Tony
I have a set of ex 911 wheels front 7, 205 rear 9 255, doesn't really affect it noticeably on the road, on track more understeery than I would like, usually over inflate the rears slightly to compensate a bit and trail brake more. Buying used track day tyres from 911 owners is cheaper than buying new tyres though - they cant use them once they are no longer road legal without a lot of hassle - they fit in the boot of a 944.
Tony
Not quite: - standard width for a late Turbo is 7.5x16" ET65 at the front / 9x16" ET52.3 rear, on D90s.
I believe the forged CS wheels on the 1988 model year 250 hp Silver Rose cars were only 7" at the front, but that changes when the 250 hp model became standard.
Jabriel, you may be interested in this general guide to relevant Porsche wheels.
http://www.944racing.de/wheelweights.php
I am sure 225/45 17 will be OK on a 7J rim if you want something wider than your 205/50. It is the limit of what I would put on that wheel, but within the range I would consider acceptable. The rolling radius is OK, in comparison to your rears, and it should look OK too.
My handbook is for 1989 model year, the Turbo power curve goes up to 250 PS, which I take as being "late" and it also only shows the wheels for the Turbo as being 7J and 9J x 16.
Well, all the factory fit D90 wheels on 250 hp Turbos were 7.5 F, and 9 R.
My handbook is dated 4/89 on page 2, and carries the document reference WKD 94402090 (car was built late 90), and on page 100 gives 7.5 F, 9 R for the Turbos and S2 "with sports chassis".
Your 89 handbook may be an earlier edition? If so it might still refer to the Silver Rose, I suppose. Which is later than a 220, but not as late as a normal D90-shod 250.
My handbook is dated 4/89 on page 2, and carries the document reference WKD 94402090 (car was built late 90), and on page 100 gives 7.5 F, 9 R for the Turbos and S2 "with sports chassis".
Your 89 handbook may be an earlier edition? If so it might still refer to the Silver Rose, I suppose. Which is later than a 220, but not as late as a normal D90-shod 250.
Copperman05
New member
Perhaps, but I dont see it in my experience having tried both. The larger tyre sizes 225 front and 245 rear were standard in S2 m030 option from Porsche and the later 968CS had 225 front and 255 rears, which also had slightly more weight and marginally more power. No one mentions them as being over tyred? Most 944 S2 cup cars run 225 or 245 all round I believe...
Whilst the steering appears slightly heavier at urban speeds, feedback from steering is increased and stability at higher speeds is much better, I didnt notice any difference in turn in. The smaller sizes may be better for city parking but overall the I have been impressed with the wider tyres, although alot of this could be down to them being better than the falkens they replaced.
Edd
Mine is dated 9/88 obviously for the '89 model year, so was the 220 available in the '89 model year?
Because there is only the one set of power curves for a turbo in this manual and it peaks at 250PS (944 2.7 -165PS, S2 - 210PS for reference!
So later (MY '90 on) they put the larger rims on the Turbos and "Sports" S2s
There is also the bit that says "....equipment and specification may not be as illustrated or described in this driver's manual"
Makes being certain what should be on any particular car very difficult!
Confused of Leicester
Because there is only the one set of power curves for a turbo in this manual and it peaks at 250PS (944 2.7 -165PS, S2 - 210PS for reference!
So later (MY '90 on) they put the larger rims on the Turbos and "Sports" S2s
There is also the bit that says "....equipment and specification may not be as illustrated or described in this driver's manual"
Makes being certain what should be on any particular car very difficult!
Confused of Leicester
I am sure your handbook is referring to the Silver Rose. Has to be.
I'm not sure when they stopped the 220 Turbo, but of course there's several definitions of "stopped". Stopped developing, in terms of new model year tweaks, stopped building, and stopped selling. The 220 was on 7 fronts and 8 rears though, so even without the evidence of a 250 hp power curve your handbook is clearly produced with the expectation that it does not get put in the dashboard of a 220.
I'm not sure when they stopped the 220 Turbo, but of course there's several definitions of "stopped". Stopped developing, in terms of new model year tweaks, stopped building, and stopped selling. The 220 was on 7 fronts and 8 rears though, so even without the evidence of a 250 hp power curve your handbook is clearly produced with the expectation that it does not get put in the dashboard of a 220.
GlennS
New member
Why not just look it up in the correct PET for your model year? It gives the standard wheel sizes and optional wheel sizes for front and rear against the option codes. If your car was delivered with other than the standard wheels then it will be recorded on your options sticker.
I appreciate that Glenn, it is just as the forum gets asked for advice, like as here, it can take some sorting out where we are starting from, to give that appropriate advice.
aporschefan
PCGB Member
In case it's relevant, I'm likely to be changing my suspension at the end of the year. Probably for with Kw-v3.
Hmmm, over tyred or underpowered? I always felt my lux could handle 100 more BHP so I bought a turbo, with its bigger wheels and stiffer springing it felt like it could handle a further 100BHP - a slippery slope that ended with me proving it
Smaller (or budget) tyres could be the cheaper option [
]Tony
Fat Albert
New member
My '88 220 Turbo runs 205 front and 255 rears, my understeer has been drastically reduced by switching from P6000s to Falken 452s on the front! I am on my second set of 452s on the rear, the first lasted 28,000 miles!
In terms of pressure, I run my rears at 32 as I like them to feel a bit more 'dug in' to the road, 35 feels far too skittish with the 452s. I am running 32 up front but after the P6000s the 452s feel a bit hard and wander a bit with the lorry grooves, so I will drop them to 30 tonight and see how they feel on the drag to Bracknell and back tomorrow
In terms of pressure, I run my rears at 32 as I like them to feel a bit more 'dug in' to the road, 35 feels far too skittish with the 452s. I am running 32 up front but after the P6000s the 452s feel a bit hard and wander a bit with the lorry grooves, so I will drop them to 30 tonight and see how they feel on the drag to Bracknell and back tomorrow
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