BritishV8 Forum

I am looking for dyno results for ANY engine that you have installed in your conversion. Namely, trying to keep apples to apples as much as possible, I am mostly interested in MGBs with any type of engine that was installed mostly stock. None the less, if you have papers and your not afraid to show them , please post them here!

-BMC.

Hi Brian,
Here's a Dynorun from the British V8 meet in Durham, N.C., 2009. Stock GM LT1 engine, 273 HP, 334 Torque.
Sorry, it's a TR6.

Video:
http://www.youtube.com/watch?v=vpO3DnFYBIs

My 2 dyno pulls from Durham meet also.    270 RWHP & 300# ft. Tq.   have since had the lower intake ported by pro and hope to have another 10 RWHP min.   The A/F ratio was stable all the way and ideal for my application.    Not too bad for 302 CID or 5.0 L Blue Oval!  Engine cammed for low and mid range use, nothing above 5K.
   

Hard to read.  Max HP was 396, Max Torque was 398.  Ford 2.3 L Turbo 4 Cylinder.

My V8 defers to Dale's 4 cyl in the POWER dept.  I do not run 29# boost or spray it!  

"My V8 defers to Dale's 4 cyl in the POWER dept. I do not run 29# boost or spray it! "

Gotta agree.  Those are some pretty impressive numbers for a four-banger.  Makes us old guys that are into big cubic inches, lots of carbs and maybe a blower look kind of dumb.

I have to disagree Rick (Even though I like Blowers and heavy boost). The big cube engines have a sort of lazy power that is bottomless in nature. If you want more it's always there, and it's there at any speed, even off idle, with a smooth power delivery that carries no surprises. It's not all about the numbers you know, it's about the driving experience and about tailoring the engine to your driving style. For some drivers such as Dale the turbo'd and juiced 4 is perfect while for others it'd be a nightmare. I think we are going to find a lot of folks really like the big inch motor once they've been exposed to the MG-Roadmaster, but of course we don't have dyno results for it yet. The numbers will be up there though, I think you can count on that.

JB

Well said Jim.......

First lets clear up one thing.  Mine is turbo only.  No juice.  I agree with Jim.  Big engines are more streetable.  I just wanted to be different.  Besides I like taking my 140 cubic inches and beating 350s, 400s etc at the drag strip.

That's right, I'd forgotten. Your car is perfect for what you are using it for and I bet it really steams those guys when they see what you are running. Pretty good way to get your chuckles I've got to admit.

JB

Don't have the papers scanned but from May 2011 at Sneeds Speed Shop near Winston-Salen, NC my 1974 MGB/GT 3.4 V6 produced about 150 HP and 200 ft/lbs torque.  It's a stock crate engine with Holly carb.

Yes, we feel the need for speed, but to some, there's also things like the "sound". There's something about the sweet noise of a well prepped V8 with the right exhaust............. I shall probably "engine dyno" the 6.1L hemi for the Healey. I would like to have about 500hp., out back. I may have learn to drive, all over. roverman.

Cool Guys! Keep them coming!

-BMC.

Dyno run results!  Sorry!! Not a MG Brian.

408.4 Rear Wheel Horse Power @ 5800 to 6135 rpm. My injectors were at 100% duty cycle around 6200 or less rpm. Need to probably go to some Ford Motor Sport red top 30 lbs injectors(Ford Chevy mix :-)). I'm still running stock 28 lbs injectors. Nice power, and all at 26 mph on highway.

Rear Wheel Torque @ 393.3 .... at 4677 rpm.

Rev limiter set at 6800 rpm

First run after reving to 6764 rpm, then letting off, it was running a little fat, let out a Huge 2 1/2 foot flame out the exhaust. I was standing in the back off to the side doing a video, kind of scared me a little + black smoke. So my video did get some of the flame but I was not focust on the camera anymore. This shop Dyno, can dyno dragters up to 2500rwhp.

I tuned this engine with HP Tuners Pro with a Dynojet II wideband O2 sensor. Mark Romans did the fine tune on the Dyno.









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This Dyno run was in 4th gear. This is hard for me to believe, on the second sheet it shows 142mph "Wow"

Calvin,
Congratulations!! You are now the King of the HP Hill!! I watched your driving video last week, then I saw this, so I went back to the start of your build thread and looked through it. I am in awe! The work is truly exceptional and the car is a masterpiece. The best thing is, now you get to drive it. What upgrades did you do the LS? Was there a predicted crankshaft hp/tq?

Hi Phil,

Thanks, but I'm not going to be on top for long as others will top it, I'm sure of that :-) Like Art or Jim B  or how about Ed Olsen's TR6, 487 Pontiac turbo flame thrower Hehe.

As far as upgrades, these Lsx series engines with all the combinations on the market now, you can predict real close what your hp to the ground is. I called Texas Speed, gave them what I was looking for, they said here you go, I bought, I received, I installed.  When getting it Dynoed, it came in within 10HP of what they said it would do.

Upgrades were, ARP bolts where they needed to be, Ported Heads with larger valves 62cc chambers, Hand Ported Fast intake by Tony Mamo at AFR, better push rods, better oil pump, better timing chain, better lifters, upgraded rocker trunions, cam, and just the right combination of parts to reach the goal I wanted. I couldn't do that with my TR6 engine :-). I went somewhat  in the middle of performance so it has nice drivability and gas milelage.

As far as Flywheel hp, I don't know. I guess with power train HP loss somewhere 470 to 500 hp. I really don't know.

I can't wait to see your Spitfire in Texas. It must handle like a go-kart.

Looking around and I see my car mentioned, LOL The higest number I have seen at the tire has been 700 HP at 5100 RPM.
I put EFI and a air/water intercooler on since then and can now can run gas or alcohol. With a tank fuel of E98 I let the Trans-brake go at the strip and snapped a 31 spline axle right away, car seems very angry now. I melted pistons above 20 PSI with the carb because the engine leaned out, with the EFI I should be able to turn up the boost till I run out of turbo, time will tell.

Ed,  What EFI system are you using that allows you to run gas or alcohol?

I went with the latest EFI from FAST, I don't have to much time on the system yet but it self tunes to you're Volumetric Efficiency and the air/fuel you pick out. You can then put in a fuel constant, for gas you use one and for E98 I have been using 0.60 for E85 I think the number is around 0.68
The car is tuned for E98 now and has what looks like a good tune, as far as gas go's all I did was change the constant and put gas in the tank to store the car for winter. With the gas the car fired right up and idled and ran great, still need to check the gas tune up but it seems very close.
Plan is to race on E98 drive on E85 and when I can't get E85 I can get by with gas.

Now that others have started to post, I will too! This may not be the 300 BHP engine but its enough to break the stock axle/tyres loose and put the car backwards into a fence- not that I have. Not yet.

This is two V6 conversions and one MGB engine set up for heavy duty autocross. It took quite a bit to get that MGB engine there and a few hours and different needles another day meant a few more BHP but a lot of work for not close to what the V6 ran without any work.










BTW: The TR6 and other conversion cars are Great. Keep them coming! I enjoy seeing base numbers just as much as these modified engines. Very few people will place a stock engine on the dyno because they are embarrassed about the numbers shown. The completely stock GM 350 V8 only made the same BHP at the flywheel that my V6 did 10 years later.

-BMC.

Here's mine from British V8 2012 in Palestine...  255hp & 285 ft/lbs... Mild 302, B303 cam, Aluminum GT40 heads, Holly 650 essentially untuned... yet

Be sure to watch the video of the fuel pressure, it will explain a lot about the results shown here. I was expecting about 350-375 lb-ft/350/375 hp. Once the fuel pressure issue is corrected I should be at or above my expectations.

You know Phil, it's hard to sympathize with a guy making 340 ft/lbs of torque while running out of gas

Rob,
You really made me laugh out loud, I didn't think of it from that point of view. It was great seeing you and meeting your dad.

Was it the A/F ratio that gave it away?

Jim