dcdc
21-09-2005, 09:59 PM
Taken from honda-tech.com
Link (http://www.honda-tech.com/zerothread?id=1376406)
H27 H22 92mm bore/100mm stroke 315WHP/236WTQ dynojet---267WHP/201WTQ Mustang Dyno « » 2:33 PM 9/19/2005 Reply Edit
H27 by Pocketrockets Racing
Please keep in mind this is an engine designed for European autocross, it is not a drag racing engine.
I have no problems making a purely drag race engine that can do +25 more WHP than this engine....I am well aware of the K and F20c series and all that Jazz. We are working on them too.
In fact I can make a 2599cc engine with a box in box Wiseco piston with a quite short(relatively speaking) 95.6mm stroke for high RPM all out effort.!!!
This is a Mustang Eddy current dyno, which is known industry wide to read 15% below the dynojet.
It is well known that a standard H22a 190-200 crank HP h22a will make ~160-163 whp on a dynojet ...and 141-144 whp on a mustang dyno.
This engine only has 12.8 : 1 static compression as this designed to run on and limited to 100 octane fuel.
It also only has 272 degree @ 0.050" lift Crane roller cams, opting for this setup to have a broad midrange torque curve.
We have achieved 267.6 WHP and 200.7 WTQ on the Mustang dyno, Independently done and verified at KVR performance, thanks Edwin and crew!
This translates to ~ 315 WHP and 236 WTQ on a dynojet.
and translates to 361-372 HP / 269-277 ft'lbs at the Crankshaft.
Torque peak is at 5750 rpm and max HP is at 8000-8250 rpm.
Tuning is done here, inhouse.
Our goal was to have 90% of maximum torque, available from 5000-8000 rpm, which we have achieved. I am content with the results.
some Specs of the engine:
92 mm bore x 100 mm stroke
Block uses Custom Darton ductile iron sleeves done by ERL Performance and further modified by us, for this unique application. Thanks to Jeff and Sean and Crew@ ERL
12.8:1 static compression
Importpowerhouse/RMF Custom 4 into 1 header with 2 1/4" collector
TWM 52mm modified Independent Throttle bodies with full enclosed custom PRR airbox, IAC, CAI, K&N air filter, TWM FPR.
525cc @ 43.5 psi Delphi injectors running at 52 psi fuel pressure
External Peterson fluid systems oil pump, wet sump, run from in behind the OEM Honda crank Damper, inline oil filter.
Crane/Ferrea 272 degree @ 0.050" lift roller camshafts
Crower adjustable cam gears
Crower 100mm custom billet crankshaft ....Thanks Brian and crew @ Crower's.
Crower Endurance pro-billet steel rods
Rod/Stroke ratio is 1.58 : 1
Wiseco custom 92mm pistons and rings, lateral gas porting...Thanks Brian and crew@ WIseco.
Ferrea roller rocker arms, valves, springs and titanium retainers
Custom P13 cylinder head with all Porting/headwork done here inhouse
Full 3 inch Thermal Research and Development stainless exhaust system with muffler, rear exit.
Denso IK24 spark plugs with magnecor wires
AEM Engine management System using OEM distributor
Aluminum flywheel.
Dyno run : 3rd gear pull...standard h box gearing....Sunoco 110 octane fuel.... Intake Air temperature were 118F-125F..........idles happily at 1200 rpm.....coolant temps never rose more than 10F during full 3rd gear pulls.
BTW....even with the full roller cams....the car got ~ 30mpg at 75-80 mph .....pulls 5th gear happily from 3000 rpm with less than 0.75 volt knock...LOL
I think I better make a 12.5:1 vtec one of these for my street motor....yippee....lol
I already passed emissions with a 2.2L 12.5:1 stge 4 Crower cams, so the bigger motor should be no big deal......lol
http://i14.photobucket.com/albums/a320/pocketrocketsracing/H27-Lewis001.jpg
http://i14.photobucket.com/albums/a320/pocketrocketsracing/H27finalpics003.jpg
Link (http://www.honda-tech.com/zerothread?id=1376406)
H27 H22 92mm bore/100mm stroke 315WHP/236WTQ dynojet---267WHP/201WTQ Mustang Dyno « » 2:33 PM 9/19/2005 Reply Edit
H27 by Pocketrockets Racing
Please keep in mind this is an engine designed for European autocross, it is not a drag racing engine.
I have no problems making a purely drag race engine that can do +25 more WHP than this engine....I am well aware of the K and F20c series and all that Jazz. We are working on them too.
In fact I can make a 2599cc engine with a box in box Wiseco piston with a quite short(relatively speaking) 95.6mm stroke for high RPM all out effort.!!!
This is a Mustang Eddy current dyno, which is known industry wide to read 15% below the dynojet.
It is well known that a standard H22a 190-200 crank HP h22a will make ~160-163 whp on a dynojet ...and 141-144 whp on a mustang dyno.
This engine only has 12.8 : 1 static compression as this designed to run on and limited to 100 octane fuel.
It also only has 272 degree @ 0.050" lift Crane roller cams, opting for this setup to have a broad midrange torque curve.
We have achieved 267.6 WHP and 200.7 WTQ on the Mustang dyno, Independently done and verified at KVR performance, thanks Edwin and crew!
This translates to ~ 315 WHP and 236 WTQ on a dynojet.
and translates to 361-372 HP / 269-277 ft'lbs at the Crankshaft.
Torque peak is at 5750 rpm and max HP is at 8000-8250 rpm.
Tuning is done here, inhouse.
Our goal was to have 90% of maximum torque, available from 5000-8000 rpm, which we have achieved. I am content with the results.
some Specs of the engine:
92 mm bore x 100 mm stroke
Block uses Custom Darton ductile iron sleeves done by ERL Performance and further modified by us, for this unique application. Thanks to Jeff and Sean and Crew@ ERL
12.8:1 static compression
Importpowerhouse/RMF Custom 4 into 1 header with 2 1/4" collector
TWM 52mm modified Independent Throttle bodies with full enclosed custom PRR airbox, IAC, CAI, K&N air filter, TWM FPR.
525cc @ 43.5 psi Delphi injectors running at 52 psi fuel pressure
External Peterson fluid systems oil pump, wet sump, run from in behind the OEM Honda crank Damper, inline oil filter.
Crane/Ferrea 272 degree @ 0.050" lift roller camshafts
Crower adjustable cam gears
Crower 100mm custom billet crankshaft ....Thanks Brian and crew @ Crower's.
Crower Endurance pro-billet steel rods
Rod/Stroke ratio is 1.58 : 1
Wiseco custom 92mm pistons and rings, lateral gas porting...Thanks Brian and crew@ WIseco.
Ferrea roller rocker arms, valves, springs and titanium retainers
Custom P13 cylinder head with all Porting/headwork done here inhouse
Full 3 inch Thermal Research and Development stainless exhaust system with muffler, rear exit.
Denso IK24 spark plugs with magnecor wires
AEM Engine management System using OEM distributor
Aluminum flywheel.
Dyno run : 3rd gear pull...standard h box gearing....Sunoco 110 octane fuel.... Intake Air temperature were 118F-125F..........idles happily at 1200 rpm.....coolant temps never rose more than 10F during full 3rd gear pulls.
BTW....even with the full roller cams....the car got ~ 30mpg at 75-80 mph .....pulls 5th gear happily from 3000 rpm with less than 0.75 volt knock...LOL
I think I better make a 12.5:1 vtec one of these for my street motor....yippee....lol
I already passed emissions with a 2.2L 12.5:1 stge 4 Crower cams, so the bigger motor should be no big deal......lol
http://i14.photobucket.com/albums/a320/pocketrocketsracing/H27-Lewis001.jpg
http://i14.photobucket.com/albums/a320/pocketrocketsracing/H27finalpics003.jpg