Here is a dyno of a S372 at 32 PSI on a four cylinder H22 Honda motor. Thats what the curves should look like, no spikes. Why is your larger six cylinder M30 different? DynaPack???
goodbye to my old T66..welcome borg s372
-
mooseheadm5
- Posts: 23035
- Joined: Apr 08, 2009
- Location: Charlottesville, VA
- Contact:
Could be lots of reasons. For one, that Honda appears to be revving out to 8700RPM by the end of the dyno run.
An M30 can't breath at those sorts of revs. That Honda could also have electronic boost control (would need to see the pressure data to verify.) Since lito is on stock head and internals, the torque will drop off pretty quickly. Could also be the exhaust, the tune, etc.
An M30 can't breath at those sorts of revs. That Honda could also have electronic boost control (would need to see the pressure data to verify.) Since lito is on stock head and internals, the torque will drop off pretty quickly. Could also be the exhaust, the tune, etc.
-
Good & Tight
- Posts: 461
- Joined: Oct 29, 2007
Re: s372
I don't know what your timing map is like but maybe with some more advance down low will help spool the turbo quicker. Or swap out to a smaller turbine housing.lito wrote:s372 with 1.00ar,is laggy..try it ....im sure u will get the same results.....
Here's my timing map to compare.
I had an engine with a power curve like that... It was a Datsun 2.0 with a draw through turbo system. At 3000 rpm I had 80 hp at 3500 I had well over 400hp it was totally unusable because I couldn't find a good way to keep the turbo spooled up. I ended up with a much smaller turbo and efi instead of the 750cfm Holley that was on the system. 240hp with a wide flat curve was much better to drive than the huge spike of 400+.
-
Murfinator
- Posts: 1482
- Joined: Sep 07, 2007
- Location: ZION - 84032
Perhaps lito followed through with his plans and cranked it up to 2 bar for another dyno pull? As I recall, the previous version of the custom intake didn't fare so well. With stock internals and an untested intake design at 2+ bar the results could be catastrophic...
Those results, if they are accurate, lend additional credence to insights gained from board members with much more experience than myself in dealing with M30/106: the intake manifold is the major cork in these motors. Open it up effectively and you can get upwards of 800 horse. Recommend rebuilding the internals first of course.
Few things I'd like more than to see Paul Burke develop a well designed and tested intake.
Those results, if they are accurate, lend additional credence to insights gained from board members with much more experience than myself in dealing with M30/106: the intake manifold is the major cork in these motors. Open it up effectively and you can get upwards of 800 horse. Recommend rebuilding the internals first of course.
Few things I'd like more than to see Paul Burke develop a well designed and tested intake.
Last edited by Murfinator on Feb 24, 2011 11:45 PM, edited 1 time in total.
s372
the car is intended for Drag race ,will be racing it on april 30.my goal is hi 10s in 1/4 mile run.will be posting video and time slips after the april 30 race.but next wk i can post some result from our Vbox 60-130mph test.the car is not fun to drive in the street.FYI there was no boost spike....just forgot to post the datalog of the boost during th dyno session...will post it too.regards to all!
