This is what you get when you massage a GTS :)
#1
This is what you get when you massage a GTS :)
Specs:
100.5mm JE Pistons
12:1 compression
GTS crank + 2R rods
GTS heads with 968 Intake valves
Mild headwork
Colin's Stage 2 cams
928 Intl Headers
Custom dual exhaust and X-pipe
BMW M5 ITBs and trumpets
Ford Motorsport 30lbs injectors
JDS Alpha-N engine management
Custom Dry Sump
First run on a basic map. I wish we knew what we are doing...
There is a lot more to come I am being told...
Mustang Dyno - a stock low miles M6 V10 made 404rwhp just before my ****ter was strapped for the mapping to begin...
100.5mm JE Pistons
12:1 compression
GTS crank + 2R rods
GTS heads with 968 Intake valves
Mild headwork
Colin's Stage 2 cams
928 Intl Headers
Custom dual exhaust and X-pipe
BMW M5 ITBs and trumpets
Ford Motorsport 30lbs injectors
JDS Alpha-N engine management
Custom Dry Sump
First run on a basic map. I wish we knew what we are doing...
There is a lot more to come I am being told...
Mustang Dyno - a stock low miles M6 V10 made 404rwhp just before my ****ter was strapped for the mapping to begin...
#4
Mr JDS, for sure we have a few questions... But I need to gather my thoughts properly, first. For the moment I am chuffed that we are knocking on the door of 500 crank hp with a standard displacement engine...
Some randon observations:
1) Short trumpets - they made 5bhp extra, but they lost 70Nm of torque. Looks like the bods at BMW knew what they were doing when they installed the long trumpets in the M5
2) Even with a dry sump, there is a lot of oil in the heads... Not as bad as on a standard engine, but still bad...
3) **** me, it is loud...
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#8
Nice work, I'm liking all the ingenious reworking of fuel rails, throttle cable wheel, fuel damper, etc. Looks great!
Interesting observation, how are you able to 'see' this? Looks like the right hand side valve cover breather holes are plugged, and the left has a pair of elbows. Didja get oil pushed up into whatever airbox you're using?
Even with a dry sump, there is a lot of oil in the heads... Not as bad as on a standard engine, but still bad...
#9
Alex,
Those are very impressive numbers especially on the torque side of things!
This will be a very very fun car to drive!
To any of you out there that are interested in increasing power, I still have a number of sets of cams available
Those are very impressive numbers especially on the torque side of things!
This will be a very very fun car to drive!
To any of you out there that are interested in increasing power, I still have a number of sets of cams available
#10
Those dyno numbers look great. I am trying to figure out the most cost effective way for hp for these cars. What did this massage end up costing you ? I understand if you choose not to divulge. 77tony
#11
a custom built 928 engine like this IS NOT cheap.... I'd guess $20k isn't too far off the mark
#12
#14
All prices in GBP as this is where I live...
Exchange crank from Porsche to include genuine Porsche main crank bearings and 0.25 undersized genuine Porsche conrod bearings + 2 x 2R rods = £2000 (could not be avoided as the original GTS crank was shot)
JE Pistons = £1200
M5 throttle bodies with trumpets = £500
ITB adaptor plates and miscellaneous work on fuel rails, hoses, throttle cable wheel, etc = £400
Colin's cams = £1000
Head work to include 16 new valve seats, 32 new valve guides and 32 new valve stem seals, and mild porting = £400
Exhaust = £500
Alpha-N = £ good deal from JDS
Injectors = £120 from Roger
968 valves = £150 from Pelican
Total = £less than $20k...
Still cheaper than a stroker and damn good results I would say for someone who knows nothing...