First off, I would highly not recommend anyone not build an engine like this.

Original engine.
396CI
Dart Pro 1 180cc
Mahle 4.030" Forged aluminum 1.5mm 1st&2nd ring, 3mm oil Plasma Moly Rings
Eagle Forged Rods w/ ARP2000 bolts and Eagle Forged Crankshaft
107.5 LSA 231 Intake, 241 Exhaust, ~.600" lift
NX 4500 Plate w/ ~100HP jets in.
Ron's Alcohol Flying Toilet Alcohol Injection on a Edelbrock Single Plane 4500 Flange intake.

First off the Plasma-Moly rings were set up for N/A running so they started touching just barely and slightly scored the walls, also the plasma-moly ring coating started to flake off at only ~10 100hp nitrous passes. These were replaced by steel top Hellfire rings.

The 180cc heads absolutely run out of breath at about the 1/8th mile so that kind of sucks but that is why I'm putting liquid oxygen into the cylinder.

The tight LSA camshaft was for a street driven stock computer N/A car so on anything over 100hp nitrous hit the increased cylinder pressure was being lost out the exhaust by the valve overlap, additional nitrous produced no gains. Also the small exhaust valve duration was not helping the nitrous as the motor wants plenty of exhaust flow.

The alcohol injection likes to milk the engine oil so I've added a vacuum pump to help.



The car was running at the track two weeks ago and I've spent at least a week waiting on parts from Summit and Jegs, screw them both.







Surface finish tester


New larger duration camshaft and wider LSA, see the difference in lobe thickness.



Finishing up the plumbing of the vacuum pump and will throw the fuel system and water system back on. Should be able to start it tomorrow and taking to to Tulsa Friday night.


Chances are that the first weekend I'll have to iron out some bugs, but with all the changes the cars best of 8.92 is going to get crushed this weekend. Probably about time to actually put the parachute out back instead of on my garage shelf.

I'll be happy with 8.50s but chances are it will rain Friday.

 

Any specs on the new cam? Why does the alcohol injection milk the oil, not enough vacuum from the old cam or that's just what alcohol does without a vacuum pump? I don't see a brake booster, are you running manual brakes?

 

The alcohol system has to be a bit rich at idle so that it has a good throttle response off of the line. As a result the methanol likes to get down in the oil pan. I use about 2 Gallons for a 1/4 mile pass.

Manual brakes, stops well.

 

Awesome, looking forward to seeing some times.

Neil

 

wish my motor was that easy to get to

 

How much you plan on spraying now?? That's a hell of a lot of exhaust duration for a 258int! .

Looking real good, that thing was kicking *** even with all the problems...lmao@180cc heads on that thing lol!

 

Only 200 this weekend, my nitrous kit only has 100 hp increments so im going to pick up the jets for a 250 for next weekend. I believe the system cant suppoert much more than 300. That duration is there to help the exhaust, with the small valve and all.

 

looking good guys. you have a good chance at taking the top n/a spot.

 

N/A? I'm a nitrous cheater then.

 

Almost ready.

 

Nice work man!

 

Is that really an LT1 anymore?

 

Well it is more of an LT1 than NHRA Super Stock racers, they use aftermarket blocks.

And if you went to a shootout you would see people running converted heads that are not LT1 at all.

Lots of fast LT1s use solid lifters, I use hydraulic roller lifters and stock lifter spider.




Anyways on to the thread.


First start, hard to prime the methanol, have to use carb cleaner to get the engine running.

 

Even has a 68 VIN so it's a streetcar too.

 

Very nice for sure! You got some badass race cars.

 

no.
just on nut alone it should run plenty strong and in good air you could probably beat that 9.3x pass by joe o. that was a baby cam you had in it and it ran 9.6x's. on the bottle that things going to move for sure.

 

I think the million dollar question is what made you decide to go with an LTx over a Small block, big block, LSx?

Anyways badass car!!

 

well decided to break it in on nitrous.

 

Ran a 8.69 best tonight.

 

Damn dude that's nuts for only a 100 shot!!!