Most street friendly boost solution to 1000+ hp?

[irishlsxer]

now were talkin boys! thx for chiming in, again let me reiterate, we're only looking for the dyno number to say we got it really. Very likely only 10-15% of driving will be at max boost if any. This car IS being built for semi serious autocross and some higher speed road race events, and will have an aftermarket sub and rear, so I dont want to completely blow the autox capabilities with twins if thats the case. So whats the verdict on twins for that purpose? I assumed a blower would make more even power and be more suitable for autocross, but as mentioned, i also assumed twins are the easiest way to make huge 'streetable' power and I was hoping the people that know wouldnt say its super tough to set them up for autox. What about heat? what form of FI is the WORST WITH HEAT???

I considered another 'bell'. here's one of my ls's kb'd.... made 700@11psi in a 4750lb vehicle in denver

[irishlsxer]

Originally Posted by camcojb

I would pick a roots style screw blower for a high hp car that will be tracked, but it's not going to make 1000 HP. Oh, they can on a dyno with ice water in the liquid intercooler, etc. but in a driving situation with heat soak they really aren't going to be 1000 Hp.

With that said I'm sure someone will post up an example to prove me wrong. Turbo(s) are by far the easiest way to that goal with a car that can run like a stock small block when cruised. Not ideal usually for the track stuff as they can be fun to drive fast, but they are trackable. A good electronic boost controller to control how the boost ramps up vs rpm and gear would be a great idea. I had several laps with Stielow driving the Mule, and it worked quite well; the boost was turned down a bit though, not on "kill". Then again, that's Stielow driving............

My ideal engine for my next car would likely be a roots blown LS. I figure it can make an honest repeatable 750-850+ HP, and that's plenty. Boost is instant, and a bit easier to drive fast I believe.

i havent taken a roots style blower off the table. I really like my kenne bell,even though its an older version.

[irishlsxer]

Originally Posted by speedjohnston

Check out the thread I started on our trip to the dyno with my friends vette. YSI supercharged LS motor making 840 rear wheel HP wich should be about 1000 at the crank, mild cam and 600 trouble free miles with a dyno tune and several full throttle runs in the middle. He also did it on pump gas and not trying to squeeze every ounce of HP out of it. Its a safe tune and he drives it all the time.
https://lateral-g.net/forums/show...tomorrows+dyno

my machinist has a 1000hp ysi camaro, Im listening.............and that vette; damn!..............why cant they make that hood for mine?

[SuperB70]

Past 20 years I've been playing with roots, turbo- singles and twins.

Now building twin screw engine with same goal as you.

Only that my starting point is aluminium 572 Hemi custom build for boost and LC 4.2L Kenne Bell. KMS ECU, direct spark coils. European new RE85 fuel/ cont. 85% bioethanol. Should give easily 1000Hp.

You can find my build thread in forced-section.

Twins are good way to make big numbers, maeby most "easiest" to drive, but the heatload they make is big problem. Not if you dont have long WOT times, but use them in road races, bad idea, the hole car will be too hot to touch.

Twin screw is more difficult to drive in the streets, if it is at high HP level, boost comes so fast and so hard.

Nice looking engine by to way

[ErikLS2]

Originally Posted by irishlsxer

thats why I said 'most' street friendly. And obviously, 'street friendly' itself is subject to WIDE interpretation. I didnt say I wanted to DRIVE IT EVERYWHERE with 1000h. Just want be able to dial it up if I happen to be driving cruise night/stoplight to stoplight more than autocross

For this particular situation lets just say street friendly means basically reliable: Which is going to generate the least heat? Most highway friendly? Gas friendly ? least maintenance? opinions on the centrifugal cog setup? any ac complications? i have blown ls cars that arent far from it so I know some about what I'm getting into. Its pretty much already been decided, just wanted some feedback.

I think NRE and guys like that would probably be shaking their heads and chuckling at YOU. It seems, in my opinion, the words 'street friendly' and '1000hp' are closer than ever. But thats what forums are for, to either answer someone with constructive advice, or stand up and be counted by your opinion about the question Lingenfelter put out a crate 427 tt that made 1000hp half a decade or so ago.

No, I get what you're saying. My point was more that this hobby has progressed to the point where there is such a thing, well almost , as street friendly 1000 hp. I'm old enough to know there were days when there wasn't such a thing. Kinda like 16+ MPG 500+ HP production cars, you know?
Good luck with the project! And like I said, not picking on you.