1990 GM + turbo build thread
#27
V8 Miata Fan
Thread Starter
That was the idea, I got some 1/2" x 2" rectangle tubing to build them, just haven't gotten around to doing it yet. Currently working on getting a lot more tire under the car.
#28
V8 Miata Fanatic
What a handful on the track! You have skills. I would have over-corrected 15 times with the speed and power you’re dealing with. Nice job. Thanks for sharing and what did they bring you in for to discuss?
#31
V8 Miata Fan
Thread Starter
Yes, I will post some
Illegally
#34
V8 Miata Fan
Thread Starter
#36
V8 Miata Fan
Thread Starter
Yes I have, I don't want to give exact details, but the weight is 2327 and the cross has been set to something I am comfortable driving. There are no swaybars on this car yet, so when I fab up some bars, the cross is going to change accordingly
#37
V8 Miata Fan
Thread Starter
Some upadates:
I took the car back to Shift Sector in October. Went 175 mph with no aero on the back of the car to keep it planted, which was fast enough to win the RWD Unlimited class (only because the other guy in the finals blew up lol). I had the car tuned and dyno’d, it made 721whp and turning it to 7300rpm, not bad for a 100% stock 4.8/5.3, at least I thought so. We were running into spark issues up in the top end. So I installed a set of Holley smart coils, I also did valve springs, pushrods, and upgraded trunnions. The goal is not really to make more power, but to get more RPM out of it, to get more MPH. I am going again in April to try for 200mph again. So I built a drag wing, added a parachute, got some real meaty Hoosiers under there, and were are gonna give it another go. Also have done a few other things since the last time I’ve posted, puke tank for the overflow tank, front air dam, etc. a
lot of small things really.
I took the car back to Shift Sector in October. Went 175 mph with no aero on the back of the car to keep it planted, which was fast enough to win the RWD Unlimited class (only because the other guy in the finals blew up lol). I had the car tuned and dyno’d, it made 721whp and turning it to 7300rpm, not bad for a 100% stock 4.8/5.3, at least I thought so. We were running into spark issues up in the top end. So I installed a set of Holley smart coils, I also did valve springs, pushrods, and upgraded trunnions. The goal is not really to make more power, but to get more RPM out of it, to get more MPH. I am going again in April to try for 200mph again. So I built a drag wing, added a parachute, got some real meaty Hoosiers under there, and were are gonna give it another go. Also have done a few other things since the last time I’ve posted, puke tank for the overflow tank, front air dam, etc. a
lot of small things really.
#39
Slow moving fast project
Also, I just noticed......No power assist with that brake pedal setup? How is that working out? Not intending to sound skeptical. I am genuinely curious.
#40
V8 Miata Fan
Thread Starter
Man... I don’t update the forums any more. Sorry guys! Well we went back after the 200mph 1/2 mile pass and ended up going 7 mph slower than last October. I built a new drag wing for the car, new tires, parachute, lowered the front air dam, turned the power up... then smoked the clutch on pass two. I think one more good effort is required to see if that 200mph is attainable.
After that I started getting the car ready for the Miata reunion. So, it got a new transmission (found some issues with the old transmission, mainly that I never opened the side cover when I bought it and that it wasn’t actually a dog box. Just a glorified T10) so I have a true, proper T101 in the car with a Long shifter, picked up an aluminum 5.3, put in a LS6 cam, I built my own control arms in the front which use adjustable screw in style upper and lower balljoints for changing roll centers now, made a splitter, made a spoiler, made a “Laguna Seca” exhaust, and I’m sure countless other things. Ryan Passey set the Miata track there on Friday before the event at a 1:35.25. I only ran Sunday, but off the trailer (my first time racing there) ran a 1:39 something. So I knew it was gonna be a hot rod. We fiddled with the car a little bit. Went out for the second session just to put some laps on it, then got it ready to give it a solid run on the 3rd session. Lap 2 I ran a 1:37.84, lap 3 it spun a rod bearing 😂 sooo that was the end of that. Car felt great, making a little too much power but I was turned all the way down on spring pressure and I forgot to bring other springs. I think a few more laps and no traffic and a couple other little tweaks and that record might fall 😁 motor is out, another engine going in hopefully tonight or tomorrow in preparation for Global Time Attack at Buttonwillow next month! Installing an accusump on it as a bandaid until I can get a dry sump on it.
Hopefully I’ll get the videos up soon!
After that I started getting the car ready for the Miata reunion. So, it got a new transmission (found some issues with the old transmission, mainly that I never opened the side cover when I bought it and that it wasn’t actually a dog box. Just a glorified T10) so I have a true, proper T101 in the car with a Long shifter, picked up an aluminum 5.3, put in a LS6 cam, I built my own control arms in the front which use adjustable screw in style upper and lower balljoints for changing roll centers now, made a splitter, made a spoiler, made a “Laguna Seca” exhaust, and I’m sure countless other things. Ryan Passey set the Miata track there on Friday before the event at a 1:35.25. I only ran Sunday, but off the trailer (my first time racing there) ran a 1:39 something. So I knew it was gonna be a hot rod. We fiddled with the car a little bit. Went out for the second session just to put some laps on it, then got it ready to give it a solid run on the 3rd session. Lap 2 I ran a 1:37.84, lap 3 it spun a rod bearing 😂 sooo that was the end of that. Car felt great, making a little too much power but I was turned all the way down on spring pressure and I forgot to bring other springs. I think a few more laps and no traffic and a couple other little tweaks and that record might fall 😁 motor is out, another engine going in hopefully tonight or tomorrow in preparation for Global Time Attack at Buttonwillow next month! Installing an accusump on it as a bandaid until I can get a dry sump on it.
Hopefully I’ll get the videos up soon!
#41
V8 Miata Fan
Thread Starter
brakes feel great, we are playing around with different pad compounds at the moment. It should most definitely have more brake on it.... I’m sure we’ll cross that road sooner than later
#43
V8 Miata Fan
Thread Starter
Update on the ride...
Biggest thing, it's not turbo anymore. That being said, it's the most fun I've had with the car in a very long time. The car is fast, set the Laguna Seca Miata chassis record in July at a 1:33.5. I really believe I can get down to sub 30 in it with some chassis adjustment and more seat time. It still has the same aluminum block 5.3, it currently makes 359hp and it runs like a champ. No more overheating, no more melting under the hood, etc.
Things on the to-do list;
install new springs
install new sway bar
build rear subframe for Winters Quick Change
install fuel cell
Then back to more sorting out, then out for some ST1 action in it.
Here is the lap around Laguna as well as a lap around Sonoma. Sonoma had a 3.08 gear in it so it was a dog. Can't wait to go back in November and try and ****** that record as well. Then next year I'll go for Thunderhill East/West, Buttonwillow, and maybe ACC if I can get down there before it goes bye bye
Biggest thing, it's not turbo anymore. That being said, it's the most fun I've had with the car in a very long time. The car is fast, set the Laguna Seca Miata chassis record in July at a 1:33.5. I really believe I can get down to sub 30 in it with some chassis adjustment and more seat time. It still has the same aluminum block 5.3, it currently makes 359hp and it runs like a champ. No more overheating, no more melting under the hood, etc.
Things on the to-do list;
install new springs
install new sway bar
build rear subframe for Winters Quick Change
install fuel cell
Then back to more sorting out, then out for some ST1 action in it.
Here is the lap around Laguna as well as a lap around Sonoma. Sonoma had a 3.08 gear in it so it was a dog. Can't wait to go back in November and try and ****** that record as well. Then next year I'll go for Thunderhill East/West, Buttonwillow, and maybe ACC if I can get down there before it goes bye bye
#44
Slow moving fast project
Late reply, but great update! Glad to hear that your car is doing work and setting records without the turbo. Now you can beat on it all day long!!
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