[krisr]

So my stock 4.120 x 3.75 400" motor made a clean pass, finally! Have been battling some valve train issues which i've now sorted out and first run of the night it went 11.4 @ 119.77mph. It backed it up with another 11.4 @ 118 and an 11.6 @ 119 when I was testing the 2-step launch (it spun..)



Car is 3850lbs with me in it. 400, with cleaned up round port e-heads (EHTTFMF!), victor EFI intake, Megasquirt 3X EFI, baby solid roller cam (255/262 @ 0.050 / 108LSA), Turbo 400 with a converter flashing to 4100, 4.30 gears with a 28" tyre.

Have a few things to test as the logs showed I was pulling nearly 2" of vacuum at WOT and I forgot to take off the 11" x 1.5" air cleaner but it still did a reasonably well MPH for a car that is 95% street driven.

I know it's nothing like you big dogs run, but it's all my broke azz can afford and a 400 is always the under dog

Am hoping to see if I can get it to about 121-122mph then work on my 60' as i'm building a 4L80e box to replace the turbo 400 so the new converter will most likely be 5000-5200 in an 8" body.

[OCMDGTO]

Wow very impressive!

[Mike Davis]

Nice Pass for a little engine.

How about a few pics of the car.

[Scott65]

Impressive Kris. Good work!

[Gary H]

Sounds like a good combination. For 3800 plus pounds and only 400" those are really good numbers. Surprised that the Victor is working that well. Would've thought a little smaller intake would have been better for the number of cubic inches and relatively stock heads.

[AG]

Wow, that is running very well.

[krisr]

Originally Posted by Mike Davis

Nice Pass for a little engine.

How about a few pics of the car.

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....

[krisr]

Originally Posted by Scott65

Impressive Kris. Good work!

Thanks Scott!

[krisr]

Originally Posted by Gary H

Sounds like a good combination. For 3800 plus pounds and only 400" those are really good numbers. Surprised that the Victor is working that well. Would've thought a little smaller intake would have been better for the number of cubic inches and relatively stock heads.

Cheers mate. Yeah i've spent a lot of time trying to science out the combination as most people don't give the 400 a look, but for a street engine I think they're absolutely fantastic!! The victor IMO is an awesome manifold if you have a converter and gears. Otherwise i'd probably experiment with something like a Torker2 or HSD (tomahawk etc...)

[krisr]

Originally Posted by AG

Wow, that is running very well.

Thanks mate! It's taken a while to work out, can tell you that much!!!

[AG]

Everything takes a while to work out the bugs and tune it right.

[GTOGEORGE]

Pretty darn good!


GTO George

[ta man]

Thats a cool car! Your times are very impressive considering running that tiny airfilter and also the soft 60ft. Awesome!

[Dragncar]

Everything about it is impressive. All the numbers and the car itself.
BTW, How did you get a std bore 400 ? Sleeves ? 389 block ? Or just a NOS 400 block ?

[krisr]

Originally Posted by GTOGEORGE

Pretty darn good!

GTO George

Cheers George!

Originally Posted by ta man

Thats a cool car! Your times are very impressive considering running that tiny airfilter and also the soft 60ft. Awesome!

Yeah hindsight bit me but because i'd just got it running and tuned well enough to make some passes I didn't have enough time to do much other than throw more fuel into it so I can get some baselines

Originally Posted by Dragncar

Everything about it is impressive. All the numbers and the car itself.
BTW, How did you get a std bore 400 ? Sleeves ? 389 block ? Or just a NOS 400 block ?

It's a '65 389 block that was taken out to take a 4.120 forged TRW. The only "thin'ish" area in the block was the lower thrust side of #7 so I filled the block up to the pump holes, re-checked the bores for round, nothing moved, so kept on putting it back together as it'd already been honed. The bottom end machine work was done around 10 years ago and the bores were still like new when I pulled it apart around 1.5 years ago for a freshen up so it just got a light hone for the new rings. The motor I'd rebuilt here in my garage other than getting the heads decked from 72ccs to about 56ccs to raise the compression to about 11.5:1 but that left me with no PTV so I ended up making some fly cutters using old valves so could recess basically 2.150" and 1.8" reliefs into each piston and cleaned them up a scotch brite wheel on a dremel so there was no sharp edges. Each piston assembly weighed before/after and they ended up within a gram of each other. I did a heap of machining and prep to everything to make sure that it'll take some abuse but also survive a lot of street miles as it's a street car, even has a child seat in the back as my 3 year old loves it (probably more than I do )

[Dragncar]

Forged TRW, even more impressive.

[Dragncar]

BTW, 11.5-1 ? What kind of fuel do you guys get out of the pump down there ?

[krisr]

Our 98 RON fuel is probably the same as your 93 over there. The only time my car has any pinging issues is when it had iron heads and around 10:1 compression. The ignition map i've build for the car was a combination of a bit of dyno time, street time and track time. i.e. the car idles best with 30 degrees of timing, cruises with 46 and 38 at WOT from about 3500 to 7000. I attribute a lot of that to the camshaft I had custom ground to suit what I thought would run best. So far so good!

[blueghoast]

That is very impressive and good MPH too.
Damb good job bub. Love the car to it's really cool.

GT.

[krisr]

Originally Posted by blueghoast

That is very impressive and good MPH too.
Damb good job bub. Love the car to it's really cool.

GT.

Thanks mate. Hopefully I can squeeze a couple more mph out of it once I make a cold air tray sealed to the scoop and take off the baby sized air cleaner, and i'm in the midst right now of converting it to E85. My ECU has a flex sensor already wired up and plumbed into the fuel line so i'm just converting any rubber line to PTFE and sourcing a new fuel pump because my Aeromotive 325lph pump is pre-e85, so will change over to a Deatschworks 300c pump. Have 10 gallons of corn juice ready! Good thing about going flex is that I have an awesome pump gas tune so I can use that as the base for the e85 tables then set the "blend" factor between the 2 depending on ethanol content so if I run low on e85, I can fill up fuel anywhere and the computer will adjust automatically. This car only ever sees a trailer if it's broken LOL