Bullet Ride's 2.8L Stroker Project (Updated: Dyno Plot pg. 6)

[digger]

Oh, I was thinking it was based on the tire size and gear ratios of the car but it's really just the constant from the hp-tq relation. Cool.
I'll fix it. Thanks guys.

You should get the same answer within a few %. What wheels and tires are you running, was it in 4th gear and 3.73?

[Bullet Ride]

Sweet setup, where did you get your cam? Also how do you like tuning it and running the 3.73? It sounds great and pull good in 4th gear!

Thanks. I got the cam fom VAC. Tuning it is pretty straight forward. The only hard part is getting a good timing map and a dyno is the only real good way to do it. I'm going to do some dyno tuning next year as I've spent enough (for my liking) on this project for now. I still use the car on the street for now, so a 3.73 diff is a good choice. If it was a track only car I'd probably try out a 4.10.

[downforce22]

Sweet setup, where did you get your cam? Also how do you like tuning it and running the 3.73? It sounds great and pull good in 4th gear!

[tinkerputzer]

That would be great, thanks!

[Bullet Ride]

Great job! Did you data log the dyno runs? Mind sharing your msq? I'm curious to see your timing map.

No datalog, I didn't bring my laptop to the track. I can email you my msq. Do you want me to send it to the same email that's tied to your paypal?

[Bullet Ride]

Those are great numbers!
Btw, torque and hp should cross at 5252. I hate it when they give the graphs with speed instead of rpm.

J

yes so 91mph=5252rpm

Oh, I was thinking it was based on the tire size and gear ratios of the car but it's really just the constant from the hp-tq relation. Cool.
I'll fix it. Thanks guys.

[digger]

yes so 91mph=5252rpm

[slippery]

Those are great numbers!
Btw, torque and hp should cross at 5252. I hate it when they give the graphs with speed instead of rpm.

J

[tinkerputzer]

Great job! Did you data log the dyno runs? Mind sharing your msq? I'm curious to see your timing map.

[camip]

Wish I had a pile of money. College and owning a e30 isn't very fun. But I am slowly collecting parts to build a motor similar to yours when I find them cheap.

[JCarp90]

I love everything about this build. So jelly. Congrats!

[Bullet Ride]

Perfect I want 200hp out of a na m20 and it seems achievable.

200hp is easy... 200whp takes a bit more work :D

But yeah 200whp seems achievable. I'm still running a stock sized throttle body and I haven't had any porting done to the head. I feel that with a properly ported head and a BBTB or ITB set-up I'd be over 200whp for sure.

If you have a pile of money you can build a 3.1L M20 with 11:1 compression and make 220+whp

[camip]

Perfect I want 200hp out of a na m20 and it seems achievable.

[Bullet Ride]

So on the weekend I was running a solo 1 event on the track and there was an accompanying car show which had a mobile dyno. Between sessions I headed over and put my car on to see what the motor is putting down. Here's the plot showing what it put down. I have the rev limiter in the tuning software set to 6600rpm right now however I haven't actually tested it, when I was on the dyno I was lifting around 6400rpm because I knew my peak power would be before then anyway. The car was getting a bit hot on the 2nd and 3rd runs which is probably why I lost some under the curve.



Edit: x-axis values converted to RPM



Some actual dyno tuning would likely yield some gains and with a bit of work on the intake side of things 200whp seems achievable. Overall though I'm happy with the numbers I put down.

[Bullet Ride]

Picked up my car this evening. I'm definitely happy with how the exhaust turned out. The shop I took it to did a really nice job fitting everything together. It's definitely louder now but not too loud when cruising, however if I open it up you can hear me from a mile away lol...