When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The diff housing is boxed in front and back. (I've broken a stock housing already).
In that video you referenced i'm on street tires (notice the wheels match front to rear). All other passes i've made since then have been on 225/50-15 M/T ET Streets. It doesn't hop on them, just dead hooks and goes which is equally unsettling whilst side stepping the clutch at 6000rpm.
The diff housing is boxed in front and back. (I've broken a stock housing already).
In that video you referenced i'm on street tires (notice the wheels match front to rear). All other passes i've made since then have been on 225/50-15 M/T ET Streets. It doesn't hop on them, just dead hooks and goes which is equally unsettling whilst side stepping the clutch at 6000rpm.
Jesus dude. I just read this thread, I didn't see any mention of rods.. are they stock?
If so, it seems interesting that you went through some pistons before ever bending a rod. Seems contrary to popular belief, but maybe it's due to stock compression on 93 octane and if it held up long enough you'd eventually banana rods.
Jesus dude. I just read this thread, I didn't see any mention of rods.. are they stock?
If so, it seems interesting that you went through some pistons before ever bending a rod. Seems contrary to popular belief, but maybe it's due to stock compression on 93 octane and if it held up long enough you'd eventually banana rods.
It's got some china forged rods in it from the v2.0 build from my first post in this thread. They carried over from the rods only build into v3.0 where I tossed forged pistons in.
It's got some china forged rods in it from the v2.0 build from my first post in this thread. They carried over from the rods only build into v3.0 where I tossed forged pistons in.
Makes sense! Do you think you had any detonation to make the oem pistons let loose, or just power related?
I didn't see any signs of detonation. I couldn't be bothered to measure ring gaps when I put together the rods only motor. I suspect it butted rings together under boost as it broke around the circumference of the ring land and the whole skirt escaped. My guess is 95% assembly neglect and 5% ebay stock replacement piston weakness. I'm just shocked the rings were able to hold the skirt on so it didn't fubar the cylinder bores.
Re-dyno'd today with the new forged piston'd engine. Changes since last dyno: Bigger billet wheeled ebay turbo, running 250kpa now, and the B series intake manifold on the miata head flange.
350whp/323wtq. The FF640's are basically tapped out at this point. It creeps to 11.9 - 12.0 as it pulls through the upper rpm's no matter how much fuel I command. I won't be running this much boost again, was just curious to see what it would make when it was set on party.
Wow those are great numbers man. Only downside is the turbo is crazy laggy judging by the Dyno graph and looks like the pull stopped at 6500rpm, I bet it would have made more power had it been revved out more. Still though congrats that's awesome!
Solid. You are the second person reporting 350whp on FlowForce 640. Definitely beyond the intended range, but so cool to see.
What type of Dyno is that?
Not sure what dyno it is. He was using an optical sensor on my crank pulley that I don't think we had adjusted perfectly. Pull ran until the rev limiter that I have set at 7400 so it probably doesn't make quite that much torque at the wheels.
I didn't log anything that time, just noticed when I punted it on the street that it kept creeping up toward 12.0 in the higher rpms despite me asking it nicely for more fuels. I'm planning on going back to the track this Thursday, I'll make a mental note to log a pass and see what the DC is.
You should definitely log your drag racing if you can get away with it. Nigel has some bigger injectors that are working very well for me, might need the bigger pump tho.
04-12-2019, 01:10 PM
0
