x-pipe-no cat, chips and rmb dyno results
02-15-2006, 06:22 PM
#1
Burning Brakes
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x-pipe-no cat, chips and rmb dyno results
i have a 1986.5 porsche 928 5peed..just had a dyno with the above...drum roll please.......... rwhp 271.4/282.5 torque...
so what do you think ? does it sound about right ??
thanks
v-tach
p.s. can't wait to get my car back...
so what do you think ? does it sound about right ??
thanks
v-tach
p.s. can't wait to get my car back...
02-15-2006, 06:31 PM
#2
Three Wheelin'
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Hi 
Is that rear wheel hp ??
My Uk S2 4.7 had 284 at wheels and 290 torque Auto unadjusted...
Roughly same specs as your apart from x-pipe fitted since and not dynoed again yet...but id think from seat of pants feel...around 5 to 10 more hp....
All the best Brett
928 S2 AUTO V8 4.7 LTR 1986 IRIS METALLIC BLUE WITH X-PIPES ,RMB ,PROMAX CHIPS, KICKDOWN SWITCH.K&N.
PCGB UK 928 FORUM MODERATOR
Is that rear wheel hp ??
My Uk S2 4.7 had 284 at wheels and 290 torque Auto unadjusted...
Roughly same specs as your apart from x-pipe fitted since and not dynoed again yet...but id think from seat of pants feel...around 5 to 10 more hp....
All the best Brett
928 S2 AUTO V8 4.7 LTR 1986 IRIS METALLIC BLUE WITH X-PIPES ,RMB ,PROMAX CHIPS, KICKDOWN SWITCH.K&N.
PCGB UK 928 FORUM MODERATOR
02-15-2006, 07:21 PM
#5
Burning Brakes
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yes, rear wheel HP...the x-pipe is from 928 motorsports...
before this the car was dynoed with the chips,cats and rmb ...rwhp 257.3 / torque was 242.6.... i wonder why i got such a jump in torque and not necessarily HP ??
thanks
v-tach
before this the car was dynoed with the chips,cats and rmb ...rwhp 257.3 / torque was 242.6.... i wonder why i got such a jump in torque and not necessarily HP ??
thanks
v-tach
02-15-2006, 07:52 PM
#7
Under the Lift
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So, you got a real nice 40 lb-ft of torque but only 14 HP. Maybe you're running out of gas at the top. How was the A/F ratio? When did you last change the fuel filter? Is the WOT part of the throttle switch working? You probably have more HP coming, but enjoy the torque. I certainly do!
Is the WOT part of the throttle switch working? You probably have more HP coming, but enjoy the torque. I certainly do!
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02-15-2006, 07:59 PM
#8
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auto adjusted???
does that mean some kind of conversion factor?
284 at the rears for any 4.7 is unusually high, but certainly not impossible.
the 85, has cams in the same range of performance (heck, best the 928 ever had on any car, including the GTS) , but 4 valve, same compression, same size MAF and it has 300cc more displacement! really no reason why a US 85 shouldnt always be better than a euro 4.7, except when the US still has the cats!
my part euro 5liter was 292rwhp, i think the east coast guys got near 300+hp with CIS.
mk
does that mean some kind of conversion factor?
284 at the rears for any 4.7 is unusually high, but certainly not impossible.
the 85, has cams in the same range of performance (heck, best the 928 ever had on any car, including the GTS) , but 4 valve, same compression, same size MAF and it has 300cc more displacement! really no reason why a US 85 shouldnt always be better than a euro 4.7, except when the US still has the cats!
my part euro 5liter was 292rwhp, i think the east coast guys got near 300+hp with CIS.
mk
Originally Posted by BRETT AINLEY
Hi
Is that rear wheel hp ??
My Uk S2 4.7 had 284 at wheels and 290 torque Auto unadjusted...
Roughly same specs as your apart from x-pipe fitted since and not dynoed again yet...but id think from seat of pants feel...around 5 to 10 more hp....
All the best Brett
928 S2 AUTO V8 4.7 LTR 1986 IRIS METALLIC BLUE WITH X-PIPES ,RMB ,PROMAX CHIPS, KICKDOWN SWITCH.K&N.
PCGB UK 928 FORUM MODERATOR
Is that rear wheel hp ??
My Uk S2 4.7 had 284 at wheels and 290 torque Auto unadjusted...
Roughly same specs as your apart from x-pipe fitted since and not dynoed again yet...but id think from seat of pants feel...around 5 to 10 more hp....
All the best Brett
928 S2 AUTO V8 4.7 LTR 1986 IRIS METALLIC BLUE WITH X-PIPES ,RMB ,PROMAX CHIPS, KICKDOWN SWITCH.K&N.
PCGB UK 928 FORUM MODERATOR
02-15-2006, 08:14 PM
#10
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Originally Posted by mark kibort
auto adjusted???
does that mean some kind of conversion factor?
284 at the rears for any 4.7 is unusually high, but certainly not impossible.
the 85, has cams in the same range of performance (heck, best the 928 ever had on any car, including the GTS) , but 4 valve, same compression, same size MAF and it has 300cc more displacement! really no reason why a US 85 shouldnt always be better than a euro 4.7, except when the US still has the cats!
my part euro 5liter was 292rwhp, i think the east coast guys got near 300+hp with CIS.
mk
does that mean some kind of conversion factor?
284 at the rears for any 4.7 is unusually high, but certainly not impossible.
the 85, has cams in the same range of performance (heck, best the 928 ever had on any car, including the GTS) , but 4 valve, same compression, same size MAF and it has 300cc more displacement! really no reason why a US 85 shouldnt always be better than a euro 4.7, except when the US still has the cats!
my part euro 5liter was 292rwhp, i think the east coast guys got near 300+hp with CIS.
mk
That 284.6 was straight from rear wheels...NO adjustment
They DID adjust for auto box afterwards by 7% to give me 306 at the flywheel...although I think you americans would adjust by 14% to 18% which would give me around 330 to 350 at the flywheel...
It IS a very powerful engine....always was even before my chips...now it has the X=PIPES (Ritech Systems ones from Richard Armstrong in UK) I will have to dyno it again...
I have a dyno jpg but cannot post here as not a member...I could email it to anyone interested and they could post it ?
No Cats by the way,,never had them from new.
All the best Brett
928 S2 AUTO V8 4.7 LTR 1986 IRIS METALLIC BLUE WITH X-PIPES ,RMB ,PROMAX CHIPS, KICKDOWN SWITCH.K&N.
PCGB UK 928 FORUM MODERATOR
02-15-2006, 08:31 PM
#11
Under the Lift
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Send me he dyno jpg. billball@gmail.com
So, you weren't lean up top...hmm...somebody else offer up how you got so much torque compared to HP.
So, you weren't lean up top...hmm...somebody else offer up how you got so much torque compared to HP.
02-15-2006, 08:33 PM
#12
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Hey V-tach....Can you feel the difference in power 
, did you get the car bone stock ?? I have the same set up, and I was blown away when I first drove it after the chips and X-pipe 
, did you get the car bone stock ?? I have the same set up, and I was blown away when I first drove it after the chips and X-pipe
02-15-2006, 08:41 PM
#13
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I have heard of mixed results with chips. The 85/86 32v is reported to respond well but my car NA dynoed better with stock v AA chips. I've heard of others having AA chips that when tested did not meet expectations. I think AA has that sorted out now. How old are the chips, brand, how did you acquire them? With SMT-6, Tom Cloutier exhaust and head p&p I was at 291rwhp 290rwtq on a dynojet with my 85. 271/285 is nothing to sneeze at congratulations.
02-15-2006, 08:52 PM
#14
Owns the Streets
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Think V-Tach has the Carl Fausett X.
Not sure how to compare HP/torque ratings with the drum roller dynos out there.
V-Tach's shark was run on one of those bolt-on wheel hub dyno machines.
Did David Lloyd do a before dyno run?
Ernest (NYC)
Not sure how to compare HP/torque ratings with the drum roller dynos out there.
V-Tach's shark was run on one of those bolt-on wheel hub dyno machines.
Did David Lloyd do a before dyno run?
Ernest (NYC)
02-15-2006, 09:07 PM
#15
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[QUOTE=Bill Ball]Send me he dyno jpg. billball@gmail.com
Hi Bill
Sent 2 emails...one with dyno chart and one with picture of my UK X-PIPES
All the best Brett
928 S2 AUTO V8 4.7 LTR 1986 IRIS METALLIC BLUE WITH X-PIPES ,RMB ,PROMAX CHIPS, KICKDOWN SWITCH.K&N.
PCGB UK 928 FORUM MODERATOR
Hi Bill
Sent 2 emails...one with dyno chart and one with picture of my UK X-PIPES
All the best Brett
928 S2 AUTO V8 4.7 LTR 1986 IRIS METALLIC BLUE WITH X-PIPES ,RMB ,PROMAX CHIPS, KICKDOWN SWITCH.K&N.
PCGB UK 928 FORUM MODERATOR