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well car has boost creep. Looks like the 38mm wastegate is too small for the turbo. Car was hitting 9psi boost cut in 3rd gear around 4k rpm...
Just going to take a stepback and drive the car as is and have Dom do part throttle tuning.
To fix the boost creep is 1 cut out the 38mm wastegate and put in a larger one 44mm or 50mm. Or 2 get a different turbo. Soo looks like I am Fk for now.
Ideally I want only 350whp, so that should be around 7-8 psi.
I don't know if my fuel system can handle double digits and I have no idea what the lower end of the block is capable of.
If you're running pump gas, I fee this is a realistic, safe range. I've never been able to get safely above 10lbs on 93 pump and have always felt that this is the j-series threshold. I've recently just made the switch to E85 and have yet to push the limit. I've basically had to lower my boost pressures for retuning on a higher volume fuel and will report back as to the results. I'm hoping for at least another 2-4lbs but this could be a bit too optimistic.
i saw your latest video. very nice. i hate no idea what esle he has. everything is on the down low
Appreciate the compliment!
I really don't understand why some people are so secretive about their builds. I brag and boast every chance I get on what's going on with mine. Lmao
Speaking of bragging, I've finally collected ALL parts for my engine build and hope to get her assembled so I can begin running some BIG numbers. Not really in a hurry. Been having so much fun with this engine since switching to e85 that the build could be prolonged much longer than I expected. Gotta love the knock resistant nature of this ethanol.
Car hitting 9.5 psi stable on the last wot run. So boost creeping about 2-3 psi over the stock 7psi wastegate spring.
How does it feel? Be careful, 10 Psi is getting close to the limit for stock compression. I know your a little lower than our 11 to 1 compression, but 9.5 is getting up there. Glad to hear it's running strong.
How does it feel? Be careful, 10 Psi is getting close to the limit for stock compression. I know your a little lower than our 11 to 1 compression, but 9.5 is getting up there. Glad to hear it's running strong.
thanks i would love to run 7 or 8 psi instead but due to the boost creep it,is kinda out of my hands.
Im currently testing the limits of e85 on the current stock motor to see what to expect on my forged motor....even if it means by destruction. I've played with sub-10lb boost levels long enough. My next motor is forged with significantly less compression. Hoping to achieve around 20lbs of boost pressure with that plus water injection as a safeguard.
So 10 psi would be the limit of the J series on stock internals? I am getting a Hondata Map sensor and will be doing the low temp thermalstat from Mishimoto. Going to be adding an oil cooler and maybe a oil relocator also. I am not sure if I can get away with just the oil cooler sandwich plate or not since it does sit lower than the lower control arm.
Originally Posted by yungone501
Thats what I'm talking about.
Im currently testing the limits of e85 on the current stock motor to see what to expect on my forged motor....even if it means by destruction. I've played with sub-10lb boost levels long enough. My next motor is forged with significantly less compression. Hoping to achieve around 20lbs of boost pressure with that plus water injection as a safeguard.
So 10 psi would be the limit of the J series on stock internals? I am getting a Hondata Map sensor and will be doing the low temp thermalstat from Mishimoto. Going to be adding an oil cooler and maybe a oil relocator also. I am not sure if I can get away with just the oil cooler sandwich plate or not since it does sit lower than the lower control arm.
I don't see how one can say 10psi is the limit of stock internals. 10psi from a VF30 turbo is nothing, while 10psi from a T88 is quite a bit more power. Shouldn't the limit be HP or torque based, rather than boost referenced? Also, 10 psi from a late spooling large turbo might even last longer than 10psi from a quick spooling mid size turbo just because torque won't spike as fast.
I don't think we've had enough sample data to say what the TRUE limit is on stock internals. I remember when guys thought that stock B series could only take 8 psi from a Drag kit before grenading (and lots did). But they also didn't use anything other than an FMU and no way to manage timing. I've seen a number 350+ whp stock internal GSRs after proper tuning methods were used.
i been doing some research on cfm vs boost pressure. like you said 10 psi can mean different things from different turbo. psi is a measurement of resistance while cfm is a measure of flow.
i think the thing we have to worry about the most is increased cylinder pressure. too much and stuff will start to break
In my own experience (which is all I can comment from), my knock threshold has been around 10lbs of boost give or take. I don't mean that's the limit of which things break due to mechanical limitations. But more like that's when things CAN break due to detonation causing mechanical damage. I'm sure there are other variables which allow even more boost but in my hot ass unforgiving region of the world, im clearly not as fortunate.
And yes, boost its simply a measurement of resistance not power. Exactly.
In my own experience (which is all I can comment from), my knock threshold has been around 10lbs of boost give or take. I don't mean that's the limit of which things break due to mechanical limitations. But more like that's when things CAN break due to detonation causing mechanical damage. I'm sure there are other variables which allow even more boost but in my hot ass unforgiving region of the world, im clearly not as fortunate.
And yes, boost its simply a measurement of resistance not power. Exactly.
Just to keep picking nits - is that 10psi from a 20lb/min turbo, a 50lb/min turbo, or an 80lb/min turbo? I would think that the knock threshold would be different on each of those, especially considering how much heat you'd be pouring into the motor on the small turbo.
Just to keep picking nits - is that 10psi from a 20lb/min turbo, a 50lb/min turbo, or an 80lb/min turbo? I would think that the knock threshold would be different on each of those, especially considering how much heat you'd be pouring into the motor on the small turbo.
car is so much fun to drive now. I am actually scared to get on it because of Tq steer. definately need a TL tranney with the LSD
This seems to be a common complaint amongst forced induction Accords and TL's. I have honestly never had this problem and can't understand why. I don't have excessive wheel spin either. My tires are 10.5" wide and I'm not sure how that compares to you (or others). Another odd thing is that my 5AT car puts down (not one) but TWO strips when I do a burn out. Hmmmm......
This seems to be a common complaint amongst forced induction Accords and TL's. I have honestly never had this problem and can't understand why. I don't have excessive wheel spin either. My tires are 10.5" wide and I'm not sure how that compares to you (or others). Another odd thing is that my 5AT car puts down (not one) but TWO strips when I do a burn out. Hmmmm......
Your turbo is a good bit bigger than Ken's - could that account for some of the difference in torque steer? His may spike boost and torque much sooner. Can't explain the two strips on a burnout though. Maybe have the wheel turned a bit and see if it still lays down two?
Maybe I will do one later tonight. I really need to car to redline. With the turbo I really feel like I don't have to do that anymore to past people. Dom just got finish with the ignition timing for the Vtec table. Just need to make minor adjustment on fuel here and there. I will also be installing a mishimoto thermostat to get things a little cooler. After a hard run the coolant spikes to 201 and then cools back down to 190 on a hot day.
06-17-2016, 07:00 PM
