Hey all, this is my first post here on gt40s.com and I am looking to have an RCR Gt40 MKII built for me with a 7.3 Godzilla. My reasoning for wanting the Godzilla over a Windsor block 427 is that I want a more modern engine with better reliability than a Windsor with modern 8 stack fuel injection and a dry sump oiling system. I also want something other than a coyote. I plan on doing a lot of heavy track days with this car and also potentially racing it. An engine like this was what I had in mind with maybe less power for reliability: https://www.willisengines.com/dyno-results-ndash-stage-3-ultra-street.html . Does the Godzilla sound like a good choice or does it just sound good on paper?
7.3 Godzilla in an RCR Gt40 MKII?
- Thread starter calebclarke01
- Start date
Ian Anderson
Lifetime Supporter
It sounds like you will break your transaxle!
Sure you can make big numbers but what will you use to put that power to the ground?
Ian
Sure you can make big numbers but what will you use to put that power to the ground?
Ian
I plan on using the Graziano transaxle that race car replicas supplies that can withstand 1000 hp
"Does the Godzilla sound like a good choice or does it just sound good on paper?"
If you haven't done so already, 'might wanna break out a ruler and put it to good use before you fill out the order form for a Godzilla. ;-) There's not much wiggle room in a MKII's engine compartment (even less in a MKI)!
Just sayin'...
If you haven't done so already, 'might wanna break out a ruler and put it to good use before you fill out the order form for a Godzilla. ;-) There's not much wiggle room in a MKII's engine compartment (even less in a MKI)!
Just sayin'...
Earl Balzen
Supporter
My MkII home built chassis project that has a 482 CI SOHC with a Ricardo tran fits.
Ron McCall
Supporter
I'd wager your home-built chassis played no small part in that, Earl! ;-)
Sounds like an exciting project.
I’ve only built 1 car with over a thousand HP and even though the car with me in it weighed 3,000#, It was a beast and without racing slicks there was no way to put even half of the power to the ground. Yes it was cool - but simply over the top and could be a real handful to control.
The 7.3 is a great motor and a real stump puller, but I think I’d look to something that produces a more street friendly torque curve rather than 500+ LB FT just over idle speed…
edit - The street tires were DOT Drag Tires that had a section width of 18”..
I’ve only built 1 car with over a thousand HP and even though the car with me in it weighed 3,000#, It was a beast and without racing slicks there was no way to put even half of the power to the ground. Yes it was cool - but simply over the top and could be a real handful to control.
The 7.3 is a great motor and a real stump puller, but I think I’d look to something that produces a more street friendly torque curve rather than 500+ LB FT just over idle speed…
edit - The street tires were DOT Drag Tires that had a section width of 18”..
Thanks for everyone's input. I do still think the Godzilla will work and with the dimensions of 28.74x27x29 inches it should fit just fine if not a little snug. In terms of horsepower I think shooting around 600-700 would be more than enough for the car because recently I did the GT40 Lemans one day experience with David Zubick of Racing Adventures and found that the 550 horsepower engine could really make that car fly! Also I do just really like the idea of putting a Godzilla in the car because back when ford was using the 427 it was originally out of the Galaxie and I would like to apply that same principle with fords more modern engine from the super duty series.
Quote
"I’ve only built 1 car with over a thousand HP and even though the car with me in it weighed 3,000#, It was a beast and without racing slicks there was no way to put even half of the power to the ground. "
This makes me feel alot better about not getting too overcomplicated/overpowering my GT40 build.
"I’ve only built 1 car with over a thousand HP and even though the car with me in it weighed 3,000#, It was a beast and without racing slicks there was no way to put even half of the power to the ground. "
This makes me feel alot better about not getting too overcomplicated/overpowering my GT40 build.
Neil
Supporter
Back in that day, Ford was putting a '60s engine in a '60s car. You want to put a modern engine in a '60s car????
Howard Jones
Supporter
Heres is some idea of the quality ($$$) of the other parts you will need:
www.rcvperformance.com
driveshaftshop.com
www.racetuning.com
5pointmotorsport.com.au
None of these are the parts you will need but they serve to illustrate the range of the costs involved in a 1000 hp power train. Remember that when (NOT IF) you break things they cost this much to replace. I don't think you can do a complete power train for less than the cost of the rest of the car. my guess is you will need to spend $70.000 to get it reliable and suitable for that much power. AT LEAST! Oh, and there is NO WAY that ANY production transaxle and associated components will live at 1000hp using a tire capable of providing sufficient grip levels.
AND if you don't want to hook up that 1000hp then why have it! Start with the tire you intend to use and build the power train to make as much torque that the tires will live with other wise it's a bench racer, trailer queen death trap.
I think you would be better served to buy a real racecar
Ultimate 934 Series 21 CV - Fixed 33 spline 300M
RCV Ultimate 930 CV joints are an industry leader in high strength and reliability. 100% made in the USA. The housing, bearing cage & race have an isotropic finish for reduced friction.
www.rcvperformance.com
CHEVROLET CORVETTE 1997-2008 1000HP Level 5 Axle/Hub Kit (Pair) - Driveshaft Shop
C5/C6 Corvette 1000HP Level 5 Rear Axle/Hub kit. Includes our new larger diameter 300M axle bars (increased from 1.125 to
driveshaftshop.com
McLEOD RXT 1000-HP TWIN DISC CLUTCH & ALUMINUM FLYWHEEL 1997-15 GM LS
FAST, FREE SHIPPING, TAX EXEMPT & EASY TECH SUPPORT! RXT Twin Disc Rated to handle 1000 horsepower with pedal effort similar to stock. The RXT Street Twin clutch kit is an ideal clutch for the extreme horsepower street enthusiast with an economically priced clutch kit. Able to hold up to...
www.racetuning.com
FORTIN RACING FRS6 SEQUENTIAL TRANSAXLE GEARBOX
THE LEADERS IN OFF-ROAD RACING GEARBOX AND TRANSAXLE TECHNOLOGY In the early 1980’s Fortin Racing began to develop the Fortin 5 Speed Transaxle Gearbox. The Fortin Transaxle has continued to evolve to meet the demands of off-road racing, desert rally racing, endurance road course racing, and...
5pointmotorsport.com.au
None of these are the parts you will need but they serve to illustrate the range of the costs involved in a 1000 hp power train. Remember that when (NOT IF) you break things they cost this much to replace. I don't think you can do a complete power train for less than the cost of the rest of the car. my guess is you will need to spend $70.000 to get it reliable and suitable for that much power. AT LEAST! Oh, and there is NO WAY that ANY production transaxle and associated components will live at 1000hp using a tire capable of providing sufficient grip levels.
AND if you don't want to hook up that 1000hp then why have it! Start with the tire you intend to use and build the power train to make as much torque that the tires will live with other wise it's a bench racer, trailer queen death trap.
I think you would be better served to buy a real racecar
Heres is some idea of the quality ($$$) of the other parts you will need:
Ultimate 934 Series 21 CV - Fixed 33 spline 300M
RCV Ultimate 930 CV joints are an industry leader in high strength and reliability. 100% made in the USA. The housing, bearing cage & race have an isotropic finish for reduced friction.
CHEVROLET CORVETTE 1997-2008 1000HP Level 5 Axle/Hub Kit (Pair) - Driveshaft Shop
C5/C6 Corvette 1000HP Level 5 Rear Axle/Hub kit. Includes our new larger diameter 300M axle bars (increased from 1.125 to
McLEOD RXT 1000-HP TWIN DISC CLUTCH & ALUMINUM FLYWHEEL 1997-15 GM LS
FAST, FREE SHIPPING, TAX EXEMPT & EASY TECH SUPPORT! RXT Twin Disc Rated to handle 1000 horsepower with pedal effort similar to stock. The RXT Street Twin clutch kit is an ideal clutch for the extreme horsepower street enthusiast with an economically priced clutch kit. Able to hold up to...
FORTIN RACING FRS6 SEQUENTIAL TRANSAXLE GEARBOX
THE LEADERS IN OFF-ROAD RACING GEARBOX AND TRANSAXLE TECHNOLOGY In the early 1980’s Fortin Racing began to develop the Fortin 5 Speed Transaxle Gearbox. The Fortin Transaxle has continued to evolve to meet the demands of off-road racing, desert rally racing, endurance road course racing, and...
None of these are the parts you will need but they serve to illustrate the range of the costs involved in a 1000 hp power train. Remember that when (NOT IF) you break things they cost this much to replace. I don't think you can do a complete power train for less than the cost of the rest of the car. my guess is you will need to spend $70.000 to get it reliable and suitable for that much power. AT LEAST! Oh, and there is NO WAY that ANY production transaxle and associated components will live at 1000hp using a tire capable of providing sufficient grip levels.
AND if you don't want to hook up that 1000hp then why have it! Start with the tire you intend to use and build the power train to make as much torque that the tires will live with other wise it's a bench racer, trailer queen death trap.
I think you would be better served to buy a real racecar
Carroll Shelby somehow ought to have found a way to shoehorn those factoids into his famous quote "There is never enough horsepower......just not enough traction." 'Could have saved more than one gear head many bucks... ;-)
I'm also interested in this set-up purely for the raw experience of this motor with the same kit manufacturer. but this answer is not at all fair..if you recall most kit suppliers have updated the underpinning/chassis. of this car essentially offering that nostalgic feeling with more modern features. so its not exactly a modern engine in a "60's car" if "today's technology" is utilized.
Thanks for the input everyone, shooting for the 650-700 hp range to be more managable. Still wanting to go with the godzilla though since the race car replicas gt40 is a moderized replica at the end of the day (an incredibly well made one at that) and does not need to be the exact same as the original 66' mkii. Also, AXULFRAX summed up the idea pretty well.
Randy Folsom
Supporter
Sounds like a fun project. I stopped by RCR a few weeks ago. I saw a RCR40 with what I think was fitted with a Coyote engine. It fit, but the chassis was significantly modified. Big notches. No room for an AC compressor. The Graziano transaxle will stick out beyond the rear clip and weight that far back will significantly impact weight distribution. There is no difference in a MK1 and MK2 RCR chassis. The MK2 rear clip does provide a bit more head room, but otherwise the RCR cars are identical. IMHO the only reason for that much power in a 2,500 pound car is bragging rights, but the same could be said for the 533 HP 302/363 going into my car. If you’re thinking steam roller tires will get the power to the ground, be aware that those make street driving difficult because they make the car hard to steer. Also, keep in mind that you will need to make room for the bigger radiator, ECU, wiring, etc. Looking forward to seeing your build.
Rob Klein
Supporter
Ok where do you stop? You will need bigger brakes, bigger wheels, more cooling, at this point just build a race car.
Also you might get some chassis flex with all that power ect......
I would just build a superlight GT-R with that set up, that would be a great build
www.superlitecars.com
Also you might get some chassis flex with all that power ect......
I would just build a superlight GT-R with that set up, that would be a great build
GT-R — Superlite Cars
www.superlitecars.com
Indy Power Products has been working to develop the system tailored to the GT40. Just give us a call, we will have a GT40 in our booth with the Godzilla installed.
The beauty of the Godzilla over the Coyote, the Godzilla is 3”’s less in width; no notching to fit it in. Indy Power Products has the proper 9 qt oil pan too.
Similar threads
