Will Hellion Single Kit make 1000whp?

Goal is 900-1000whp on E85.

engine :
Teksid block
8.9:1 Diamonds
Pro I beams
Ported heads w/turbo cams
ect ect


Will the Hellion Single kit get it done?


looking for some opinions before I pull the trigger.

Doable. Bump the compression up about 10.5cr if you're sticking with e85.

01blckcobra said:

Doable. Bump the compression up about 10.5cr if you're sticking with e85.

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i would like to have high boost E85 / low-boost pump gas tunes. would 9.5 be a good middle ground?

There are a few things you'll need to get there:
A turbo that will support 1000rwhp.
Increase the downpipe diameter to 4".
A short runner intake (sullivan, PSR, etc.)

If you're not afraid to put the boost to it, you do not need a lot of compression.

smashedheadcat said:

There are a few things you'll need to get there:
A turbo that will support 1000rwhp.
Increase the downpipe diameter to 4".
A short runner intake (sullivan, PSR, etc.)

If you're not afraid to put the boost to it, you do not need a lot of compression.

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I was hoping the kit as it comes would be good enough. the gen 2 7675 turbo is rated for 1300hp. Id also like to run a 01 cobra intake?

I think the 01 intake would be a restriction. At least in stock form. You could get it ported though.

Do you have the skills to make your own kit? It seems most people end up modifying the turbo kit well beyond the original set up. You might be ahead if you start with something like the CG Fab kit and build up from there.

I would guess your turbo could move enough air to make 1000rwhp, but it's not a cake walk. When you put together something that can make four digit power, you really need to get everything working together and you need to eliminate inefficiencies.

Example:
An unmodified Hellion turbo kit has a single 3" downpipe. Do you think a single 3" exhaust is setting you up to make 1000 wheel? Elevated pressure in the downpipe will reduce the efficiency of your combo. Increasing the downpipe diameter to 4" will reduce restrictions in the exhaust track and increase efficiency across the board.

The 99-01 cobra intake is an intake designed to promote low/midrange power with peak power coming between 5-6000 rpms with torque dropping off rapidly as the RPMS go up. This is good for a street car, but not for dyno queens. Shortening the intake runners will reduce restriction on the intake side and also shift the powerband to the right. That will allow you stretch the RPMs out and gain power on the top end.

Obviously there are many little components you'll need to support that power, but a stock, long runner intake and 3" downpipe are not meant to do what you're looking to do. Now there is nothing wrong with the combo you're looking to put together, but it is not one that is going to slay the rollers. It will still be fast. All I am saying is you'll need to adjust your combo to make the dyno numbers you're looking to make. I

That kit will be choking at 1000whp. It will make it, but it will be choking. 4” down pipe, and honestly calebs headers are a great idea as well as a ported intake at the least.

Making power with a 4v is pretty straight forward, you’ll wanna budget a lot for cooling, trans, diff, and fuel. You’ll spend $10k on those parts to keep the combo happy.

Just in oil, fuel, cooling and trans/clutch, diff, axles, suspension and brakes, wheels, gauges, exhaust, tuning and so on I spent north of $20k. That was 100% separate of engine/turbo kit.

The hellion kit will support 1000whp and worst case you could just run a bigger 80/82 wheel or whatever will fit. They may also offer the kit with an 80 from the get go. Either would be a healthy t5.

But seriously really pen out your goals and your budget.

I loosely planned my build for a few years but when I actually got ready, I took a week to put down every number and detail, and get lots of feedback and quotes. I still ended up over budget but I anticipated that and was comfortable with where my project went, I had a ceiling and never hit that thankfully.

You will come up on compromises or niche opportunities like “powdercoat this or not” “heat coat this or not” “stainlesss high grade bandclamps or simple stuff. $50 here $200 there braided line, wear point or lifetime fasteners etc.

Plan twice, measure thrice, spend once

Man, you need WAY more compression, minimum 10.5 even if you plan to run pump gas once in awhile. Do not build a turd, low compression engine.

Your turbo will also be maxed out. I also think that Hellion kit is a real compromise with the exhaust routing, it's just not super efficient. It will have major backpressure issues as you approach 4 digit power. I'd personally be looking at a bigger turbo if it were me.

If you're shooting for that kind of hp.... I wouldn't be switching fuels. You need to stick with one, unless you have deep pockets and patients. Like anything. if you want 600-700 you build for 1000. So 1000 you'd build for 1500. At Least that's what I do.

Better off running E98 or say F it and run M1

badcobra said:

Man, you need WAY more compression, minimum 10.5 even if you plan to run pump gas once in awhile. Do not build a turd, low compression engine.

Your turbo will also be maxed out. I also think that Hellion kit is a real compromise with the exhaust routing, it's just not super efficient. It will have major backpressure issues as you approach 4 digit power. I'd personally be looking at a bigger turbo if it were me.

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1 full point of compression is worth 3-4% more hp.

I’m running 9.3/1 and make 800whp on 10psi and 1200whp on 30psi but what do I know...

11/1 compression in a coyote makes sense because you have safety’s for it from injection to vvt.

With a obd2 from 2003 piggy backed by a handheld and a laptop, I chose not to run more than 9.5/1, and listened to livernois for a 9.3/1 compression.

Only way I’d suggest 10/1+ is standalone like big stuff 3 or dominator ecu or e85 only

Randy Haywood made 1300rwhp with an iron block 5.4 with 8:1 compression back in 2002. Now I don’t think the OP should go that route, but like tt335ci03cobra said, compression isn’t the only way to make power (but it sure helps).

Yeah.... what setup..... hellion or custom... 900-1000whp on hellion kit... 2cent.

74%ef at about 27psi.... need compression bump for 1000whp

tt335ci03cobra said:

1 full point of compression is worth 3-4% more hp.

I’m running 9.3/1 and make 800whp on 10psi and 1200whp on 30psi but what do I know...

11/1 compression in a coyote makes sense because you have safety’s for it from injection to vvt.

With a obd2 from 2003 piggy backed by a handheld and a laptop, I chose not to run more than 9.5/1, and listened to livernois for a 9.3/1 compression.

Only way I’d suggest 10/1+ is standalone like big stuff 3 or dominator ecu or e85 only

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But you also have cubic inches on your side. One of the reasons I went with the 5.3 for my centri set up.

slo984now said:

But you also have cubic inches on your side. One of the reasons I went with the 5.3 for my centri set up.

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True, my buddy Scott made 1070whp on a modified 76mm hellion though at 28psi. 4” downpipe custom cold side but otherwise hellion.

My 30lbs tune is at 96% fuel trim so with a stand alone it has 50-100whp on the table. Pretty rich when we did it.

A lot of my cubes are from a 3.8” stroke which isn’t the best way to make power. Better for torque.

Example, take two 5.0l engines but one has 4x3” bore stroke and the other has 3.5x3.45 and the 4” bore will make more power and rev higher all else being equal

If you take a 4.6 and put my same build to it, it would be very laggy but probably 750whp on 10psi and 1100+ on 30psi, but we would be talking about ridiculous lag. My 5.3 isn’t a spring chicken at 2500rpm like my 5.4 with 57’s was

tt335ci03cobra said:

1 full point of compression is worth 3-4% more hp.

I’m running 9.3/1 and make 800whp on 10psi and 1200whp on 30psi but what do I know...

11/1 compression in a coyote makes sense because you have safety’s for it from injection to vvt.

With a obd2 from 2003 piggy backed by a handheld and a laptop, I chose not to run more than 9.5/1, and listened to livernois for a 9.3/1 compression.

Only way I’d suggest 10/1+ is standalone like big stuff 3 or dominator ecu or e85 only

Click to expand...

What is the max compression you would recommend for someone that wants to switch between E85 and pump 91 regularly?

badcobra said:

Man, you need WAY more compression, minimum 10.5 even if you plan to run pump gas once in awhile. Do not build a turd, low compression engine.

Your turbo will also be maxed out. I also think that Hellion kit is a real compromise with the exhaust routing, it's just not super efficient. It will have major backpressure issues as you approach 4 digit power. I'd personally be looking at a bigger turbo if it were me.

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10.5 safe for low boost pump gas?

Low compression is the 'old way'. No turbo build that runs on e85 should be less than 10.5 compression, period.

You can run that compression fine on pump gas for low boost/timing.

A lot of people here worried about peak power and forget that higher compression will help across the entire power band rather than just at the top like low comp high boost. Net/Net peak power will be about the same but you'll have a much faster and enjoyable car with higher compression.

If you plan to make a 1krwhp car and drive it all the time and have a 91 tune you'll find quickly that isn't the best choice even more so if you are on a factory computer and not a stand alone.