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Big shout out to CPR for the dyno time and support. Couldn't have done it without them. Joe and his crew are awesome.
Wanted to dial in the AFR before next half mile event, and CPR was nice enough to offer up the dyno for some pulls. Semi-successful evening. Had a misfire at high RPM. Could feel it in the car, and it would pop through the pull. Probably the 2+ year old plugs that I've been running forever, but who knows. I'll swap plugs out and see what that does. Other than that the B&B mufflers don't like high HP. So they will have to come off. First 3-4 pulls they kept blowing shut. Car would get quiet around 4500 and go stupid rich from the valves blowing shut. Had to safety wire them open to make clean pulls.
Max power it made was 2341rwhp on the dyno. We think that maybe an error as it was the first pull after wiring the mufflers open, and don't think that was worth 1200rwhp, but maybe they are that restrictive. After that, just got AFR dialed in, but didn't have time or will power to mess with plugs and get the misfire fixed. All runs logged 62% ethanol so maybe more power there.
Anyways, with misfire made 1118rwhp. You can see the misfire on the graph. Power curve is sweet though. Doesn't nose dive like a lot of big cube YSi cars so that is nice.
Glad you were able to get some tuning done on the dyno. Sucks that you were dealing with misfires and mufflers, but I'm sure you'll get those issues sorted out pretty easy. Very impressive amount of power for a street driven car.
Pulled two plugs. ~.045". As I put it to my friends, they were gapped like a catholic choir boy.
Will have fresh plugs in at .025" tomorrow. I'm sure that was the misfire.
Made 10 pulls, drove to sportsman, bought ammo, drove to dinner, drove home. I can't complain for a car with a nice stereo, ac, heated seats that drives like a dream. No cam surge, no idle issues, no problems besides it likes to spin tires.
Your car has always been a great build, and it’s lasted.
But in reality the reason it’s lasted is because you’ve had a solid short block, and top end with the right parts. As you stated, you quickly diagnosed your issues with the mufflers, and are swapping out plugs. This needs to be a post that if things aren’t done right, and you either don’t have fat pockets for maintenance if you race your car, or have the mechanical means to fix small issues like yourself, this power level isn’t for everyone.
Keep on keepin on. You provide great insight to the new guys in here.
Your car has always been a great build, and it’s lasted.
But in reality the reason it’s lasted is because you’ve had a solid short block, and top end with the right parts. As you stated, you quickly diagnosed your issues with the mufflers, and are swapping out plugs. This needs to be a post that if things aren’t done right, and you either don’t have fat pockets for maintenance if you race your car, or have the mechanical means to fix small issues like yourself, this power level isn’t for everyone.
Keep on keepin on. You provide great insight to the new guys in here.
The shear amount of "little work" on a 1000+ build is astounding. If someone doesn't have a shop on a full time retainer, or ability to do stuff themselves, I don't know how they do it.
My setup is very similar to yours, I just went back to a stock intake manifold from a cheap sheet metal one. I would be very content with similar numbers. What pulley combo are you running?
Stock intake probably made more power, definately made more mid range.
2.7" and 8" lower. Only reason I'm running the metal intake is long term reliability. Plastic one split at 23-24psi after 100+ passes. Rather have reliable, since this is a daily get around car, that I actually put miles on and enjoy. I'll give up some power in exchange for reliability.
Logged 244kpa on these runs, so ~21ish with weather yesterday. Inlet on blower just like normal. Drove to dyno, made pulls, drove to sportsmans, bought ammo, drove to dinner, drove to home depot, drove home. Swapped plugs this morning. All were .045 or larger. Did test run, no more break up.
Honestly up in Denver you will never see enough boost to hurt an intake. So keep it as is. I fly to Denver tomorrow for another week of fun there. Fort Collins Monday, Golden Tues-Wed, and Boulder Thurs-Fri.
What was stock motor? Lost 2-3 psi with the new intake, because it is less restrictive. The small motors pop intakes faster since they see 25+psi easy. Bigger the motor, lower the boost, better for the intakes.
Should make good power. If you can't crack 1100+ with ease something is wrong. We overlayed Joes graph when he made 1160rwhp on his Ysi and it was interesting because he was a 376ci. Made a TON more torque and low end, up to 5500 or so, then when I start misfiring he kept going up. If you compare actual power bands though, it was crazy the difference.
With real e85, or more ethanol, and the new plugs I would guess on his dynojet I could make 1140ish if I had to guess, but wasn't shooting for numbers since all dynos are different. Can go put it back on the other dyno and make 1200 again if I wanted, but ohh well. Joe was pointing out that a local car did 620rwhp on a west side dyno then came to his shop and did 580rwhp, so if I want bigger numbers I can just go over there. I just wanted the AFR dialed in before the half mile. Got it dialed in, so I'm happy.
The loss of torque from the sheet metal intake actually makes the car easier to drive. Doesn't blow the tires off instantly.
I had a Symbol Performance Sheet metal intake, I believe the runners are shorter then the G1 and I was very upset with the loss in torque compared to my stock ls2 setup, I also had a ton of idle issues with it. Later we found the throttle body not sealing 100% due to the 90mm TB on the 102 opening.
Jimmy was there filming for the youtube series, so good chance of that.
I definitely think the g1 intake was a good purchase for my need. For cars like mine and Alberts that pop stock intakes, it is a nice change. If you are making <18-20psi, then I would stick with stock intake unless you want to soften the midrange on purpose, which some people may want to hook up better.
Nice looking graph Unreal and best of luck on the next half mile run event.getting ready to throw mine on the rollers and see what it does.just curious what this YSI will make.
ECS kit doing work with G1pro intake
