[BruceWilkie]

Nice Kris. I've always liked 400s and 428s both are underrated IMO.

[70 bird]

Congrats! nice car.

[Half-Inch Stud]

krisr,

You must be a very good tuner because 11.4 @3850 Lbs with the 400/400 is haulin! Top-end MPH shows great flow!

The Total ADV is a suprise to me but i've been using iron heads exclusively. E-heads to my front?

[krisr]

Thanks guys.

HIS - Once I get it running on corn juice, I might hire the chassis dyno down the road and do some sweeps to see if I can tune the curve a bit better because at the moment it's just flat 38 from 3600-7000. Most engines i've done will respond very well with adding a few degrees or taking a few away at different RPM points to hang onto MBT. My E-Heads are the old bathtub chamber type so i'm not at all surprised that it loves timing.

I just looked at the timing map again and between 3200-3600 i'm commanding 40deg at WOT. Theory was to try and yank on the converter a bit harder out of the hole as it's flashing to about 4000 but the converter i'm not touching until I get the 80e box built. Whether having my timing curve set like it is, it kind of works I think but i'll mess with at a later date. It 60's pretty good like that for a heavy thing with a tight converter!

[hp 400 dave]

Nice combo and car. My old 402" combo with early ehead chambers liked 40 degrees timing also.

[taff2]

Nice combo and car mate (my first musclecar was an Aussie Falcon 2 door-Mad Max type), I've always preferred the 389/400 combos-short stroke is easier on the factory blocks. Looks like you're making around 500 horse-still a lot left in that little 400 yet.

[adam woodmancy]

awesome numbers, love to see someone still using a true 3.75 motor. I sure love a good 400, and i love a Holden, thanks for sharing!

[krisr]

Originally Posted by adam woodmancy

awesome numbers, love to see someone still using a true 3.75 motor. I sure love a good 400, and i love a Holden, thanks for sharing!

Thanks Adam. I've converted the car over to flex fuel so am running E85 at the moment but am having fuel delivery issues now so I need to swap back to a fuel cell in the trunk with an in-tank hanger setup as I love big quiet in-tank pumps. I took the car out to a car show that let us do "parade laps" on a twisty track. I quickly found out that I drained the fuel system dry in 3 seconds on ethanol burying my foot to the carpet, so gotta switch back to a fuel cell. But the throttle response and pickup is awesome! Wish I tried it years ago!!!

https://www.youtube.com/watch?v=5nnPU_Zw3f8

[455firebird1969]

Originally Posted by krisr

Hah thanks mate, yeah it's an old Holden thing that was based off a '70 GTO. I've basically had it since I was 18. The car has a pretty good soul and is a well known car around here being a Pontiac swapped car living in a world where everything is LS swapped....

LSwhat? That is Icing on the cake, good job!

PPTTFMF

[Scott65]

Kris, you couldn't do multiple in tank pumps to keep from doing the cell in trunk deal? Or maybe that's your preference... I did that deal years ago and didn't really care for it. Good luck getting it properly fed whatever it takes!

[adam woodmancy]

kris, i will tell you that on my mild 405, with stock crank, rods, and speed pro flat tops, 1st gen e-heads and victor, 255/262 solid f.t. cam, my motor didnt show that big of an improvement on the dyno going from 93/110 mix gas hp carb to my 750 kjp methanol 4150, it made 496 ish hp and less than 500 ft lbs on gas, and 523 on alcohol with still under 500 ft lbs. i figured the torque would be where the big gain was, but it hardly moved and the hp went up around 25hp. fast forward to putting it in the car on gas, it felt like a lazy pig. it wouldnt hardly turn the 275's over on the street, i did nothing but swap carbs and fuel, and it was crisp and skating all over the place. I wouldve swore it was a completely different engine. I'll admit, it was running rich on gas which contributed to it being lazy, but i picked up 4 tenths in the 1/8th mile by changing carb and fuel. its amazing how things react in real world tests vs the dyno.

[steve25]

Your improvements over Gas as fuel is do to the E 85 taking up more room ( more fuel vapor) in the runners which is off setting the effect of the E heads port volume being too big for your motors cid and power band!

[pontiacmark]

Beautiful car and impressive times.

I added this link to what has to be your car.

https://youtu.be/a04mD93LBAg

[krisr]

Originally Posted by Scott65

Kris, you couldn't do multiple in tank pumps to keep from doing the cell in trunk deal? Or maybe that's your preference... I did that deal years ago and didn't really care for it. Good luck getting it properly fed whatever it takes!

Nah it's not a pump problem, it's a swirlpot problem. The bucket (See attached pic) gets emptied too quick and the syphon jet can't refill it fast enough and because it's mounted towards the front of the tank the fuel runs away from it. I baffled the tank to help but after checking the duty cycle of the injectors, i'd need to do a lot of surgery to fix it or just bite the bullet and go back to a 20gal cell. It's only become a problem with ethanol. Normal pump gas it's fine with a 325lph aeromotive pump.

Originally Posted by adam woodmancy

kris, i will tell you that on my mild 405, with stock crank, rods, and speed pro flat tops, 1st gen e-heads and victor, 255/262 solid f.t. cam, my motor didnt show that big of an improvement on the dyno going from 93/110 mix gas hp carb to my 750 kjp methanol 4150, it made 496 ish hp and less than 500 ft lbs on gas, and 523 on alcohol with still under 500 ft lbs. i figured the torque would be where the big gain was, but it hardly moved and the hp went up around 25hp. fast forward to putting it in the car on gas, it felt like a lazy pig. it wouldnt hardly turn the 275's over on the street, i did nothing but swap carbs and fuel, and it was crisp and skating all over the place. I wouldve swore it was a completely different engine. I'll admit, it was running rich on gas which contributed to it being lazy, but i picked up 4 tenths in the 1/8th mile by changing carb and fuel. its amazing how things react in real world tests vs the dyno.

Yeah this car doesn't really do a full sweep on the chassis dyno properly because the converter just hits 5000 and spins the tyres so the trusty old mph on the timeslip has been my measuring stick. I'm hopeful that the ethanol will help in the first 330' as the car's no lightweight. I've got 295/55 ET Street radials on it and before on the street it would just hook up and boogie, but now it'll dance all the way down the road like they were coated in trans fluid but this is on 30psi of pressure on the street, I normally run 17-18psi at the track. Have seen a few aspirated engines pickup with just a simple fuel swap so figured why not give it a go too!

Originally Posted by steve25

Your improvements over Gas as fuel is do to the E 85 taking up more room ( more fuel vapor) in the runners which is off setting the effect of the E heads port volume being too big for your motors cid and power band!

You're going to have to explain that one, very specifically. Are you saying that the volume of E-Heads on 400's don't work but squirting more fuel through the injector somehow "pads" the walls to shrink the volume? Not sure what you're getting at.

Originally Posted by pontiacmark

Beautiful car and impressive times.

I added this link to what has to be your car.

https://youtu.be/a04mD93LBAg

Thanks mate, yeah those guys were there when we were doing laps around the track for a 30+ year old car show. They commented that the car sounds very pi$$ed off when it's running because the cam is on 108LSA. No-one picked the engine conversion either