01 blue bullitt

I have a 447 ci 14:1 compression on e85... up top it is breaking up around 6500 or higher. Right now I have a br7ef in it and they are gapped tight like .25 does anyone have any experience with this or can guide me in the right direction.

Jimbo1367

I'd ask the engine builder.

blk00ss

iTrader: (66)

Well there's your problem. 25 hunthreths gap is huge. Lmao.

Gray86hatch

iTrader: (83)

The plug should not be a issue. Ran those to 7700 on mine.

How is the valvetrain and ignition system

Tim

01 blue bullitt

I don't believe it's floating valves it has pac .700" springs with plenty of seat pressure. On the data log you can see injector duty cycle drop down like the car missed out. Stock coils relocated with 7mm wires and I'm starting to think it may need a bigger wire

Gray86hatch

iTrader: (83)

If it was missing it would go lean and duty cycle would go up. If closed loop is trying to correct it.

Tim

01 blue bullitt

Here is the data log

Gray86hatch

iTrader: (83)

Not really easy to see what you have going on but coil dwell and your overall tune up could be a issue also. Has it ever reved over 6500 clean.
Will it free rev
What are the specs of the engine.

01 blue bullitt

Yea it has, it will free rev past it.

Ls3 block 447 ci stroker trickflow 245's hand ported by brett land, fast 102 port matched, morel link bars, 263/271 cam, 14:1 compression, e85, 1 7/8 arh, 3 inch y pipe to 4" merge dumped, 60lb injectors which at gm fuel pressure they're 73.3# but data log says 95% duty cycle walbro 450 pump

Gray86hatch

iTrader: (83)

Problems I see the y pipe is killing it.
I would put tr6 in it
26-27 total
You need 80lb
Possible the fuel system is not up to the task. What size lines
What oil is in it.

01 blue bullitt

10-30 vr1, -6an feed... the y pipe I don't think restricts it that car went 10.55@133 breaking up like it is not making any of the shifts and a 1.8 60'... I just switched to a tr6 gapped at .30-.32 and same thing... I'm thinking it's ignition or fuel related but it doesn't go lean.

blk00ss

iTrader: (66)

I know all setups are different. But I ran a br7ef with my 445 at 12:1 gapped at .035. Now I'm running a br8 due to upping my nitrous. I didn't lose any MPH at all by switching to the colder plug. So I don't see that as your problem at all.

Gray86hatch

iTrader: (83)

That oil is too thick for those lifters. They recommend no thicker than 5-40

My car with the 418 would blow the dual 3 off the car. 3.5 on mine.

-6 is too small with e85 and that much power.

Tim

01 blue bullitt

Erl recommended the oil that's in it... as for the feed I know people using the stock feed. Fuel pressure doesn't drop, so if I switch to a -8 you think it'll fix it?

Gray86hatch

iTrader: (83)

No you have a few things fighting you. The bigger line will help when you get it running right and making power.

ERL has not impressed me with the quality of work lately. Lots of errors and not taking responsibility for them.

Erl is not aware of the lifters you are using.

My 454 made power well past 7700

Tim

01 blue bullitt

It made 604 to the tire... just don't understand what would cause high rpm stutter. Like its misfiring or on the limiter

blk00ss

iTrader: (66)

So you're saying 10-30 vr1 is too thick of oil for the morels?

Gray86hatch

iTrader: (83)

Yes too thick.

Mine made 590 ran 9.24 144 the day before with the same tune.

Tim

01 blue bullitt

What was race weight? What compression?

Gray86hatch

iTrader: (83)

3000. 12-1

Dyno is a tool I take it with a grain of salt. It does not simulate going down the race track. That was the first time I had been on the dyno in 10 years. Didn't learn anything other that it makes 590 from 6400 to 7700.

Tim