JDS99

Well, my car has taken the back burner for a while. I have a ZL1 in the shop right now for a full custom build, 427 LSX twin 6870's etc. that i'm having some fun with. BUT I took some time to get my pile back ready to play again a little bit ago and finally caught a break long enough to get over to the dyno. I feel fortunate that there is a Mainline PS2000 hub dyno 35min away from me that owner was willing to let me use. For anyone in the Houston area, this is over at Powerfab Autosports. The Mainline is EXTREMELY nice. It allows you to control axle speed for a linear ramp up. In this case, it was set to only allow 160 rpm/sec increase giving very good resolution in HPT log for dialing in fuel.

Results (not dynojet glory numbers, loaded and SAE correction negative):
852hp at 14.5psi and 19deg
987hp at 18.5psi and 18deg (checked plug and had A LOT of room left)
1,051hp/970tq at 21.5psi and 15deg
1,150*/1,038tq at 23.5psi and 15deg (don't know for sure, clutch started slipping and let go of it after peak torque spike)

Overall i'm pretty happy with how the system is performing. For the 21.5 and 23.5psi pulls, I pulled a lot of timing out with plans to add some back in. However, since clutch wouldn't hold it there was no point in continuing. I'm confident it could have been 1200+ before 23psi with a little timing back in it. When we compared logs for these 2 runs on the Mainline, it was gaining over 40hp/psi before the clutch started slipping. Turbos were definitely getting in their efficiency zone. Will have to address clutch soon so I can turn it on up.

Drove it down to dyno, and drove it back

Quick rundown:
LQ9 block 403ci
Dragonslayer crank, ultra h rods
Old set of custom W2W Mahle 2618 pistons
As cast LSA heads with slight hand smoothing in runners
My own turbo system with Turbonetics journal billet 6468's, .96ar T4, 4" intakes, dual 3.5" exhaust all the way out, 29x6x4.5 custom bell a2a
Monster LT1-R twin disc clutch

21.5psi dyno video:

Here is 21.5psi pull (red), and 23.5psi (blue) that was aborted from clutch slip.

inspector12

It was good to see it in action man! Sucks about the clutch, I thought you were going to put down north of 1200rwhp as well before clutch let go etc... Looks like you have more room to grow than probably your motor will take even lol!

FYRARMS

TheCartel

very nice man! Always a win driving to and from the dyno! lol!!

JDS99

Lol!! Agreed! I'm pretty sure these cheap ol journal 6468's will make enough to put a hole or two in the block if really pushed. Put proper size turbos on these motors and you don't have to go crazy on the motor build to make some jam. Just let the snails breathe. Unless the clutch forgot to eat it's spinach of course

Thanks for coming out! Always more fun to share this stuff with friends. Can't wait to see yours back playing again.

regorih

Can you explain a little bit about this ?

checked plug and had A LOT of room left)

MVP'S ZO6

He's probably referring to not showing any signs of detonation and the annealing of the ground strap on the plug (Timing mark) saying it wold have taken more.

inspector12

That's exactly what he was referring to. Timing mark was still on the cold side by a good bit and plugs looked clean. No signs of detonation.

Rkreigh

boost a move!

Love the curves from those twins. very impressive

1k + should keep you happy trying to hook it

I think a good boost by speed system might allow you to hook all that oooff dah

slow ride

Sucks about the clutch Jon, maybe Monster can fix you up or you need to quit making so much powa This things making well north of 1200 DJ numbers and could possibly make 1400 on kill on a DJ like we spoke about years ago. I'm glad you are getting to enjoy it some.

algZO6

WOW!!! Great numbers!!!

neverstop

that's a really cool dyno where you can control the wheel speed like that

regorih

So exactly how does that work? Do you make a pull and immediately shut off the engine and pull the plug or can you make a pool and de accelerate and pull the plug to see the time and Mark?

Turbo-Geist

Congrats Jon on a great design that has been further validated. I think we've know all along that what you spec'd was working very well. Good job on documenting it with this dyno trip.

I'm looking forward to seeing it turned up and also making some passes down the drag strip and runway.

inspector12

Anyone tuning a car should take fresh plugs to check the timing marks and look at the plug in general for signs of detonation and fueling. But yes you put in new plug or plugs, make a pull and then pull one or all depending on what you looking for. Look at the timing mark and will usually tell you what the motor is liking timing wise, and you can look for specs of AL for signs of detonation and if you know what your looking for and depending on the fuel used you can look at the fuel ring as well. Not all fuels leave a trace like Ethanol's in which you use the color of the plug instead. Hope that helps you some although that was just a quick run down, you get the basic idea. Back to Jon's dyno results. I was surprised at how well those journal bearing turbots came on and were working pretty good Jon.

b16gsr

man this is awesome, she is making some power for sure, congrats

JDS99

Thanks guys.

I admit I'm a little surprised myself on how well these turbos come on. With most going precision, there's really not much data out there on these turbonetics billets. There was definitely a difference audibly when going over 20psi, and how agressively these spooled. I would imagine the ceramic bb version would come on a good bit sooner. I'm more curious now how far they will go.

I'm may have a plan coming together for clutch resolution, so this will get pulled sometime soon. I have been pretty happy with how the lt1-r twin drives. Even with the sintered iron pucks, engagement is smooth and fine in city. I am signed up for Pump Gas Invitational in early May, so would like to not be clutch limited.

venomws7

Congrats man & great work.
at 1st I was going to so low numbers I thought it's 427ci 6870s but with that dyno & turbo very very nice.

JDS99

Thanks, yea not 427 or 6870's for mine. I suppose my first post could have been confusing since I mentioned that for a ZL1 build I have going right now. It's the one getting the 427 lsx and 6870's. Dual 4" exhaust, and a lot more..

venomws7

Very very Niceeeeee