hjholter3

He doesn't need 5 gears... it's called 'torque', the more you have the less gears you need

Dyno tuning would make it happen. Ever seen that corvette with the 6 litre aluminum block and twin turbos putting down 1000 horses? Brian is only 20 cubes and some tuning away from that, and as he isn't restricted in how much cubage.. I'd say bore it out and use a little less boost..

He has alot more time for that than most of us.

What? You don't like cheap, reliable power?

It'd be as easier to drive on the street than a huge cam'd mustang and you see those fools out there everyday.... Imagine this, he turns the boost down and all of a sudden it's streetable

[

hjholter3

Hint to Brian.. get a chute. Hint to Jim.. make excuse to go into garage

hjholter3

I'm laughing because there's a Stock Cube LS1 WS6 Vert out there running 7's.. and lets subtract 3000 from 3800 pounds, shall we? whats that? 800 pound advantage?

the 1200 horsepower number has been done on the LS1 with twins before, and faster numbers have been ran in heavier cars...

if/when he wins the PGD's and if they put an LS1 Rx7 on the cover of hot rod.. lets just say alot of rotary engines will show up on Ebay...

Read the prediction above...

hjholter3

That isn't hard to fix, imho.

Win the damned thing.

Talk to STS about an F-Body style turbo kit.. it'd put the weight 'elsewhere' in a way that would be more satisfactory to your normal customer.

Say, maybe these people could help you out?

The rotards want to say this as F-body cars that blow them away every weekend sport cages..


comments?

jimlab

No, but highway driving is another story. What are you turning at 70 mph with no overdrive? Even with a 28" tall tire, I'd bet it's more than 3,000 rpm.

RX-Heven

iTrader: (1)

Not that I care either way about streetabiltity, but since when does turning down the boost help with daily drivability? Like when your lumpily idling at a light...in vacuum.

hjholter3

And that's a problem? It's certainly not a daily driver as that much RPM could get annoying to anyone with an Fbody background, but the rotar-morons wouldn't mind.. they see much more RPM every day

hjholter3

It means 'less octane required'. That lumpy idle? that's called Character, get some

TT_Rex_7

Ok, so lets think about this for a second shall we?! He has a twin turbo setup that i'm sure will have some lag. Not only that it will have a 2 speed tranny. Not to even mention he won't make it about a whole 20 miles till he has to refill. Not exactly "streetable" IMO. Turning down the boost isn't going to help much. These car's don't even have **** for traction with ~400hp.

-Alex

TT_Rex_7

Who said he needed 5 gears in the first place?! He simply stated he thought it was with the factory 5 speed. So now how do you come up with the idea that the more torque you have, the less gears you need?! Since your on the kick about corvettes, they have quite a bit of torque, does that mean they should go back to the 3 and 4 speed transmissions that they originally came with?!

No one stated that 1000+ hp couldn't be achieved with a twin turbo setup, they just stated it's unlikely that it'll happen with the turbos and setup that he has.

That all depends on what happens. Test and tuning starts on May 12th. He has a month to learn how to drive the car, dial it in, and fix anything that he may break. Not exactly the most time in the world.

I'm not even going to get started on this topic. Keep the comments between rotary and piston engines to yourself. These things have closed many threads in the past, and i'm sure is against forum rules.

Ok, so lets think about this for a second shall we?! He has a twin turbo setup that i'm sure will have some lag. Not only that it will have a 2 speed tranny. Not to mention he won't make it about a whole 20 miles till he has to refill. Not exactly "streetable" IMO. Turning down the boost isn't going to help much. These car's don't even have **** for traction with ~400hp.

-Alex

TT_Rex_7

Oh really? So now explain to us how you could fix that problem while using 93 octane? (Rules)

Hopefully he does well! I guess we'll all find out soon enough!!

Yea, thats a real smart idea! There's been quite a few problems with STS's setups with several diffrent kits. Besides, having it in the back of the car requires an electrical oil pump, which adds to the list of what could go wrong. For a drag setup, it's not a huge issue. With a street car, it's just added risk. If that goes, kiss your turbo goodbye. The STS kits include a buzzer for the oil pump, but by the time it goes off, and you have time to pull over, your turbo will already be gone. Besides all of that, there's other reasons why no other kits mount a turbo in the back of the car. (spool up, ect. ect.)

I'm sure they could. Atleast your right about something!

Speak english much?!

Think before you speak!

-Alex

Edit: Opps, I made a DP 2 posts up. Couldn't go back and edit it.

TT_Rex_7

So less boost automatically means "less octane required?" There's alot more to factor in than "less boost." This event requires 93 octane, which is what this car will be setup on. Turning down the boost isn't going to make a damn diffrence in how streetable this car will be. Only thing that'll happen is SLIGHTLY better gas mileage. Besides, you couldn't run any less than 93 octane on this sort of setup, even if you ran 1psi. Hell, you could take the turbo's off of this car, and you'd STILL need to run 93 octane.

-Alex

1234rotor

iTrader: (1)

I think that car is cool, and will meet the 8-second zone before this season is over.

The proof is in the pudding.

There are steel body stangs in the 6's on a 10.5" slick @ over 200mph.

A steel, and aero 2800lb fd with 1200hp will run mid eights easy WITHOUT being tubbed. The only weak link is the rear suspension and chunk. A ladder-bar or four-link suspension, with a nine inch rearend will cure all that.

pianoprodigy

Riiight.

hjholter3

In a drag application such as this one, the auto will be the most efficent way to transfer torque (which accelerates the car) from the engine to the wheels.

Corvettes have more torque than your 'average' sport's car and don't require as much torque multiplication, but rather less input speed as provided by more gears


If he only works a 40 hour week, he'll have 160 hours. I'm sure he'll work some 'overtime', maybe that isn't the most time in the world to you, but he should be able to produce results..


Not as much as you think. The LS1 should be able to spool both effectivily with at most minor lag.

Does it need more?

And how do you know this? Gas mileage is dependent on fuel maps and compression. He could LS1edit from the interior of the car to a 'streetable' set of fuel maps.

Traction is a function of suspension and the rubber it rides on. If he was running factory skinnies, he might have traction problems, but with decent width rubber it wouldnt be something to worry about. Also the powerband isn't 'all or nothing', it's a nice curve as opposed to the spike you may be used to.

wingsfan

He could, except that he's not running a GM PCM anymore.

They're running a bigstuff 3 standalone (http://www.bigstuff3.com ).

LS1edit sucks for FI applications. It's relatively old and archaic by todays standards. It takes forever to read the PCM, and also takes around 2 minutes to flash the PCM, so you're not making adjustments in real time.

HP tuners seems to be the flavor of choice if you're sticking with the GM PCM. They developed both 2 bar and 3 bar support for 99+ PCMs. It flashes a little quicker, but still isn't realtime.

hjholter3

Displacement.


Only when necessary


I could say the same to you

hjholter3

He would have similar, or better software support to tune it, don't you think?


It's not for real time adjustment, but rather to change between DD fuel maps and drag fuel maps which you've already prepared. I would say if time was an issue, you might consider a diffrent hobby, but I'd hate to give Jim a new motto...

Read above.

hjholter3

In this case, yes.

Such as static preboost compression ratio, engine load...

Well duh, hence 'pump gas drags'.

You keep telling yourself that, me, I'm going to get a sandwich...

And depending on his pre-boost static compression he might be able to run less octane and diffrent fuel maps for a remarkable hit on topend performance

Really? how much cam is he running again? how much actual engine compression is present without boost? I'm asking as you seem to be the expert..

Remember that sandwich I was talking about? I'm going to get it now....

wingsfan

I know what it's for, I got rid of mine in favor of a standalone. Edit works, but IMHO it's a PITA. Certainly the idea of having different maps saved for different applications is a good idea.

Time's always an issue. Realtime adjustments are nice. And having to pull over to the side of the road, switch the engine off, start the flash procedure, and pray like hell that it doesn't crash during the upload is no fun.

And Jim's a smart man. I'm sure he doesn't need you to think up a motto for him.

Enjoy the sandwich.

hjholter3

It's that or HPtuners, and is better than nothing.

Hence my mention of it.

It's an issue if your street dragging, and even then I'd expect you'ld have some prep time. In Hinsons case, he has time.

That was never my intent, however once I read what I had written I realized to whom it might apply. Hence the attempt at humour with the comment

Done, was good. tuna on rye

gnx7

iTrader: (10)

"Ok, so lets think about this for a second shall we?! He has a twin turbo setup that i'm sure will have some lag. Not only that it will have a 2 speed tranny. Not to even mention he won't make it about a whole 20 miles till he has to refill. Not exactly "streetable" IMO. Turning down the boost isn't going to help much. These car's don't even have **** for traction with ~400hp.

-Alex"



Alex-

You are aware twin turbos spool faster than a single larger turbo right? Same applies from pistons to rotaries. The car unless it is under boost WILL get decent gas mileage. I'd imagine the same as rotary in town (ask my pal Dave RX-Heaven)...

Hinson's car is a drag car bro.... even if he is running stock springs and Koni Yellows!

A 2spd powerglide weighs about 80lbs... a T56 weighs 135lbs+... a little more weight savings. The advantage of the powerglide is the 1:76 1st gear which helps to not blow the tires off upon launch under boost. The lighter the car with turbos the less gear you need out back as the piston engine works better under more load with less torque multiplication from deep gearing. Rotaries need the deep gear because they don't make as much torque as a turbo'd V6/V8.

I think Hinson's car would be faster with a 3:07 Dana 44 Viper rear end out back and not spin the engine as high.... but we'll see how it does with the 3:90's.

As far as streetability... you don't need a big cam to make a turbo V8 go fast. The cam in my n/a car has more lift and duration than Harlan's 8.0@170mph+ twin turbo 3400lb Firebird with 346ci LS1 stock block/crank based engine. Enuf said.

THis can be argued until the end of time. Until the HR PGdrags happen we are all speculating. I think his recipe is good.... just whether it simply simmers or boils down the track is the question.

In 2005 there will be quite a few impressive LS1/FD's to further ruffle the Team Rotary feathers.

-Mark

GsrSol

Ok no one ever said he will be making 1200hp at the PGDs so don't think that will be the proving ground. Remember 1200 is only an ESTIMATE!

You don't build a 1000+hp car to be a daily driver unless you're one of those few Viper owners.

Look at what the guy has done and give him some f'ing credit.

RX-Heven

iTrader: (1)

That means nothing for streetability.
I can lower the boost @ 17 psi on pump gas to 10 psi.
Don't bother mentioning boost @ 2x psi either.
Boost has nothing to do with streetabilty as does octane.
You can have barrels of race gas delivered to your house and run high boost with the required octane anytime on the street. I know of some that do this actually. Not practical in my book, but there cars are perfectly streetable at high boost.

Try again.

I happen to like those lumpy idles btw.

TT_Rex_7

First of all it was exaggerated, which I thought I made clear, guess not. Second, do you really think a 1200hp car is going to get great gas mileage or something?

-Alex