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4.9 stroker rwhp seems low.
Posted: August 21st, 2011, 1:01 am
by Kingy146
hi, i have a 2000 jeep wrangler with 4.9 stroker engine, 3'' intake , 3'' throttle body , extractors 3'' exhaust ,sct base tune running 33'' tyres and 4.88 diff gears only making 165rwhp doesnt seem rite. what could be wrong? an what rwhp should i be making.....
Re: 4.9 stroker rwhp seems low.
Posted: August 21st, 2011, 7:59 am
by Cheromaniac
Big tires won't help the HP number but despite that it's still low. Can you post the dyno sheet?
Re: 4.9 stroker rwhp seems low.
Posted: August 21st, 2011, 3:23 pm
by shawnxj
4.88's are way too low for 33's but not sure that would show up on the dyno
Re: 4.9 stroker rwhp seems low.
Posted: August 22nd, 2011, 12:59 am
by Kingy146
yea i have 35'' tyres on the way, also i will post the dyno print out as soon as the shop e mails it to me.
Re: 4.9 stroker rwhp seems low.
Posted: August 22nd, 2011, 3:29 am
by Kingy146
Re: 4.9 stroker rwhp seems low.
Posted: August 22nd, 2011, 12:31 pm
by Cheromaniac
There's no rpm scale and no torque scale either but I'm going to guess that the dyno run was done in 3rd gear and assume that the 147km/h end point was at the 5300rpm redline. That would mean that peak HP comes in at 4400rpm and your WOT AF ratio seems to be locked in at stoichiometric until 3000rpm.
What was peak torque and at what road speed (or rpm)?
Do you have a manual or auto tranny?
I know the Dyno Dynamics load dyno is popular in Australia and they use road speeds in km/h, so are you from Down Under by any chance?
Re: 4.9 stroker rwhp seems low.
Posted: August 22nd, 2011, 1:54 pm
by Kingy146
ok yea i am in australia, and the run was done in 4th gear it has the std 5 speed manual. that is the only print out i have at this stage, my jeep is going in to be tuned in 3 days time. i will post all dyno figures once it is tuned.