sleeved 5.2/GT350 heads/Hellion TT dyno

olaosunt · Dec 6, 2016

I think the new engine deserves its own thread

So I finally got the Hellion car with the sleeved 5.2 block/GT350 heads back on the dyno after 2500 miles of breaking in and street logs.

The dyno may have confirmed what I felt from my butt dyno that the car was faster at the same boost. It also seems to spool faster and makes higher boost per duty cycle of controller (40 is now equal to 55/60)

Only got to make pulls at 15 psi as started breaking up with the newest tune revision which I hope we can sort swapping to fresh plugs and gapping closer.

The tuner had taken a lot of timing out of the latest revision (which I could also feel) as he wanted to add in the timing at high boost after dynoing on the lower timing.

The first pull was with the cutouts closed, and with the cutouts open as before it made more boost and power but was breaking up as you can see in the graphs
Tuner made some changes adding fuel but it was breaking up even more.

I decided to see what the higher timing tune (like it was with the old alluminator engine) did)
Dyno operator said that was the best it had run and did not break up.
Made even more power (75 hp) at same boost level compared to alluminator.
Graph below
I think some of that was the likely higher dynamic compression ration with the heads but I assume some is the freer flowing heads and extra displacement.

Can’t wait to be able to turn it up to 20 psi

Travis@boostworks · Dec 7, 2016

Not sure why there are break-up issues. We're running 30-32psi with stock coil packs and Brisk plugs gapped at .025". No break-up at all.

Has anyone measured back pressure with this kit yet?

Burnin4 · Dec 7, 2016

There's definitely no issues with the Hellion kit, there's more documented results with this kit on S550's then any other on the market. I'm sure he'll figure out what's causing the issue, my Hellions make 1000+ on 21psi, trap 150+ on 20's.

Olasunt, good to hear your car is back up and running, I look forward to whatever you are going to do to/with her, lol.

Strokerswild · Dec 7, 2016

olaosunt · Dec 7, 2016

Burnin4 said:
There's definitely no issues with the Hellion kit, there's more documented results with this kit on S550's then any other on the market. I'm sure he'll figure out what's causing the issue, my Hellions make 1000+ on 21psi, trap 150+ on 20's.

Olasunt, good to hear your car is back up and running, I look forward to whatever you are going to do to/with her, lol.

Thanks Hellion bro !
Just trying to follow your foot steps. Lol
I hope to figure it out before I put her to bed for winter .
I am no expert but it does seem to me increasing the timing seems to help with the breaking up .
How much timing are you running ?
May be one of the tunning experts can "school me " on this .

olaosunt · Dec 8, 2016

So.... got on the dyno again today with an updated tune and it ran better making about same power at the last pull 2 days ago.

We went up 1 psi(16psi) and made more power but still breaking up a bit.

Got an update tune and went up anther psi but breaking up was worse so decided to swap to new plugs and gap to 0.022 as tuner .
It ran much better but no extra power and looked like it was going a bit lean up .Also finally able to get a torque reading as converter not slipping.

I noticed tune not adding fuel(STFT ) like before -Fuel system is JPC with triple pumps and ID1300s.

Hope to get a tune update by tomorrow so we can hopefully make more power safely.
..... and get that "1000"
I hope the 55's are not maxed out but will swap to 62's if needed .

Overall still pretty happy as it looks like there were gains from new motor alone- making same power as I did on the alluminator at 2 less psi .

olaosunt · Dec 8, 2016

In summary gained another 30 rwhp from 15-16 psi but no gain @17-runs better with new plugs/smaller gap.
making same power as old motor with 3 less psi.

Dennisn · Dec 9, 2016

It'd be nice to see rpm instead of mph. Look like your pulling to 7500?? Stock mani?

I'm hoping to be around where you are for power. I'm putting in an aluminator and going to turn it up. Running the same 55's so it'll be a nice comparison. I'm curuious are your o2's in stock location?

Also didn't notice you still running id1000's or you upgrade to 1300's? You mind if I ask who's tuning?

Tommy V · Dec 9, 2016

Looks like Jpc triple pumps with id 1300,not sure who is doing the tune though.

beefcake · Dec 9, 2016

killer

olaosunt · Dec 9, 2016

Thanks man.
Just got the BMR parts I ordered .
Going to add the adjustable toe links,LCA bearing and FRP knucke bearings to the CB005/Viking shocks/Koni struts/BMR drag springs .
Hoping for sub 1.4 60's as I try to break into the 8's next season .

olaosunt · Dec 9, 2016

Dennisn said:
It'd be nice to see rpm instead of mph. Look like your pulling to 7500?? Stock mani?

I'm hoping to be around where you are for power. I'm putting in an aluminator and going to turn it up. Running the same 55's so it'll be a nice comparison. I'm curuious are your o2's in stock location?

Also didn't notice you still running id1000's or you upgrade to 1300's? You mind if I ask who's tuning?

I am not sure if it is due to the converter slipping but the torque readings and power readings are all over the place on the graph with rpm .

Yes , upgraded to the ID1300s when I switched to the Jpc systems with triple pumps .
Daniel @ TSS is tuning the car and is making some major changes now to fix the fuel issue .
I should have plenty of pump and injector even at this power level .

HELLION TURBO · Dec 9, 2016

Awesome numbers!

:headbang:

olaosunt · Dec 9, 2016

HELLION TURBO said:
Awesome numbers!

Thanks guys .
How about a "hook up" if I decide to upgrade to the 62's.
I love the Low end grunt of my 55's and don't think we are quite done yet.
If they break 1000's then I am good .
If I did get the 62's they would have to be ball bearing which would probably spool as fast as the 55's.

olaosunt · Dec 9, 2016

Also thinking of "testing " the GT 350 manifold by doing back to back comparison with the 12 intake (the 15's won't work with the heads).
I know Hellion has kind of "tested" on the GT 350 with the Kit but this would be a comparison and at high boost to see if and what are the gains.it will proabably only be at high rpm but may be worth it in a max effort drag car .

Any vendor want to supply me an intake ? I will return it if there no gains . lol
I will pay for the the dyno and Tunning

sleeved 5.2/GT350 heads/Hellion TT dyno

olaosunt

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Travis@boostworks

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Burnin4

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Strokerswild

Shallow and Pedantic

olaosunt

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olaosunt

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olaosunt

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Dennisn

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Tommy V

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beefcake

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olaosunt

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olaosunt

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HELLION TURBO

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olaosunt

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olaosunt

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