93 LX 347 with twin 66mm turbos...3400 lbs



8.54 @ 161 on 275 Radials through the tailpipe on 18 psi

 

man thats awesome do you have a build thread here?

 

No...I didn't have the time to fully document my build with pictures and videos like most of the awesome build threads on here, but I am thinking about writing a detailed account of my build and putting it in this thread. Thank you for your enthusiasm...the car is a beast and a true street car. I built the car to run 25 to 30 psi...the car might run high 7s, but I need a bunch more safety equipment to upgrade over this winter first.

 

Nice Notch!

 

Thank you Sir.

 

And through the mufflers! Wow! Amazing build. Congrats.

 

Nice

 

Nice run! I think your screen name needs to be updated.

 

HaHa...yeah, I guess I do don't I? Thanks!

 

Turbo's for the win. Once you go turbo you'll never go back.

 

Guessing that the gasser was making 90% of the noise there? You solidly dusted him too.

 

really? 162mph on 18psi with a 347? Were you datalogging? 18psi seems awfully low for that kind of power on a street car. Far be it for me to call BS on a car I have no clue about. I'm just curious about it. What are you revving to? How light is the car? Solid roller? More details on the motor, please and thank you.

 

Well, I'm not really sure what to make of your post. Sounds like you are doubting me or trying to make me look like an azz for some reason. Not sure why. I have no reason to lie about my combo. I do appreciate your "thank you" in your post though. I've been building these cars for a very long time and am very proud of my accomplishment with the car...especially since I have built the whole car entirely myself and tuned it also. This car has never been on a dyno...all street low boost tuning and higher boost tuning at the track.

At any rate, I will entertain your curiosity and provide some details:

The car weighs 3400 lbs which I put in my first post of this thread.
I have data-logged some of my passes in the beginning, but my last several visits to the track I have not really worried about logging...I just watch the wide-band, the boost gauge and look for the shift light.

On my 8.54 passes I saw the boost in the 18 to 18.6 range, so I guess technically I should round it up to 19 psi if that makes everyone feel better.

I run Morel high rev hydraulic lifters with a custom Bennett Racing turbo grind...I shift at 7000 and go through at 7200 with 3.27 gears and 28" DRs.

My motor is simple: Man O War 4.125 bore block, Diamond 9.6 to 1 pistons, forged Scat components, ARP fasteners, Edelbrock Vic JR heads out of the box, but with PAC very aggressive valve springs (solid springs basically), Edelbrock Victor 5.0 EFI intake box stock, 75 mm throttle body (believe it or not), blah, blah, blah...all tuned by me with 120 lb injectors by a Holley Dominator. The car has run 9.30s on pump gas and 8.50s on C16. My goal for this year is a few more lbs of boost and hopefully some 8.30s or so.

Any other questions, let me know. Cheers!

 

Nope, you misread my intent. Not tryin to make you look bad, nor even doubting how the car ran. I'm only wondering if a 347 can go 162 at only 18 psi, or even 18.6! I was just wondering where the number came from, and how accurately you knew it. I got to thinking that maybe the car was a lightweight, but I missed that in your early post. Sorry.

So, 162mph with a 3400 lbs raceweight means you're making ~1150 hp according to the calculators, and I assume they mean at the wheels. And cars similar to my build have got into the 8s and mid 150s, but we're talking 25 psi full tilt runs. You're going faster at lower boost. That's why I was curious.

I'm sure part of it has to do with efficiency of twin 66mm turbos vs. a single 76. Some quick beer math says it would take a bit over 500 rwhp on motor + 18.6 psig with 100% efficiency to make the ~1150 rwhp.

I'm just trying to figure things out, man. No offense intended. It's really awesome. Thank you for the feedback.

 

I understand your confusion I suppose. I've never been a dyno numbers guy. I've seen tons of guys around here put down impressive chassis dyno numbers and then have their cars perform subpar at the track for various reasons. I have done the calculators also for my car , as it has surprised me as well. The calculator I used came up with 1106 hp at the flywheel, not the rear wheels. Keep in mind I'm running a Rossler TH-400 also, so I'm sure my dyno rwhp results would be misleading. Is it possible that my AEM boost controller/gauge is off? Sure, I suppose, but my early datalogs have matched the gauge at lower boost, so I have never even questioned it. I'm putting in more cage and a chute on the car this winter so it will get even heavier...ugh! Oh well, I'll just turn the boost up higher. I honestly built the motor (ring gap especially) for 25 + psi of boost. I'd like to try it this year if I can keep the tires hooked. Not sure if the car has 7 second power or not, but I'll probably find out eventually.

By the way, the cars in your signature sound bad azz...have you run either one of them at the track yet? A buddy of mine has a very similar car to your 363 car and has been high 9s at over 150 on pump gas, no meth injection, driving very "safe".

At any rate, all is good. Thank you for explaining yourself a bit better. I'm not in this for drama, I just honestly have a passion for it and will help anyone I can accomplish their goals with the tiny bit of knowledge I have. Cheers!

 

Nice job

 

Thanks...I love the 1st Gen Lightnings...I still want to build one someday with a stroked Windsor and twins! How does your truck run? Do you drive it on the street at all?

 

Yeah, to an extent. I was fascinated with 2 guys on this forum years ago. "Wolverine" was one." I've forgotten the other's username. Wolverine had a T56 331 with a GT42-76 and never went faster than 10-flat, but put down 1017 rwhp. The other guy ran an almost identical build and *only* put down ~850 to the tire through his TH400, but went 8.50s in the mid 150s before he changed his setup to another turbo and went into the 7s, I think. So, I get your point. Your trap speed says it all.

Do you do anything for that like slew-rate control, or boost retard?

Well, it's been rough putting together the '91. It's taken 10 years to get it back on the road and there are still some bugs to work out. After getting it together, I had some severe clutch issues with a McLeod twin disk. Got it working this fall. Then started burning oil. Turned out to be the lower intake failing to seal and sucking oil in from the lifter valley. Tore it down in December and am currently caught up working towards my Masters. So, I haven't finished putting it back together. I'm trying to figure out how to get every millimeter of tire that'll fit in the mini-tub, but that's more of a challenge than I realized. I could just throw a 12" slick on and call it done, but if I can fit a 14" in there, that would help. The aggressive manual transmission launches and the power it puts out can use every bit of traction I can give it. Just not quite sure how to optimize it without testing 4-5 sizes to see if they'll work. I won't be satisfied until it's going mid-ish 9's. If it won't do it as is, then it'll get a bigger turbo, better suspension, or whatever else needs to be done.

The '93's numbers are more dyno queen-ish. It's got an MM, non drag-oriented suspension and an 8.8 rear with 31 spline axles. It's a good looking, very comfortable street cruiser with awesome manners, and I don't think it'll ever keep its tires planted. I imagine it'll be great from a highway roll-on, but I plan on keeping it on pump gas and seeing if it'll plant ~600 rwhp on the street in 3rd. If so, it'll make me very happy.

They're both ultimately just street cars, but the '91 is definitely the racier of the two.

Thanks for the kind words.

 

Yeah,it's a street cruiser,small turbo. Here's a short thread if you want to take a look: https://www.theturboforums.com/threads/gen-1-lightning-single-66mm-build.378494/