FC's in NASA PT
I'm bringing this thread down from the Second Gen specific section
https://www.rx7club.com/showthread.p...1#post10415265 Post a pic of your car and points you are taking. Maybe we can figure out the ultimate PT FC. So far there are 3 cars, each with a different approach. Here is mine http://i969.photobucket.com/albums/a...s/C79C1037.jpg Here is how we point out and stay in PTD (basically it's keeping the weight) Current points with car at 2800lb coming off the track with driver 9- Tires- 10 point 225's We lose a point for width 1- cold air intake 1- under drive pulley 2- header 2- exhaust 1- cat conv removal 3- limited slip 3- shocks 2- springs 2- sway bar 3- bushings (spherical and solid metallic) 2- brake calipers 3- splitter 3- facia/air dam Total is 37. I will use the extra 2 points for weight reduction to be safe |
Tinner
http://i157.photobucket.com/albums/t..._ver1-6069.jpg My base class is PTD as a TII with an engine swap, dyno classed at 185rwhp at 2850lbs. +8 tires, 255 RA1, base tire in PTD is 245 +3 shocks +1 inverted shocks, the Stance coilover front struts are inverted +2 springs +2 sway bars +3 air dam |
Rock Lobster
https://www.rx7club.com/attachment.p...4&d=1285092234 9 months ago this was a bone stock, automatic, 1989 GTU with an anemic engine (non functional VDI and aux ports). We completly tore the car down, just about every nut and bolt and built what you see here. I have had very little time to document the build but i hope this winter to take pics and do some writeup. First thanks to my friends GooRoo, Damian, and benandersonracing.com it makes all of it worth it to race and build with you guys... Some build highlights: - Pineapple Stock Port Series 5 Race motor (stage 3 oil mods). Built from almost all new parts, the only used parts were the rotors and the e-shaft. Wired open VDI and aux ports. - Pineapple rebuilt series 4 transmission with custom trany mount for auto chassis (1986 gears) - Stance 8k/6k coilovers - Stock Sway bars - Full Corksport 2.5" exhaust with headers - Rtek 2.0 -Fully rewired. The engine harness, front harness and rear harness were completly removed and new circuits were wired and harnessed from scratch. Only the stock emissions harness was used and half the wires were pulled out of it. - Depowered 15.1:1 rack. - Removed A/C - removed Dash and all equipment underneath - Fuel tank empty with no driver, full stock glass and steel body panels the car weighs in at 2300lbs. - All emissions removed - Bone stock fuel system (no issues and no fuel starvation until down to about 3-4 gal in the tank) - Miata Torsen Rear end with various gear ratios (4.1, 4.3, and 5.12) is what we will run depending on which track we are at. - Aluminum flywheel and driveshaft - 6-pot wilwood front brakes with 2-piece rotors and rs/rz rear brake rotors -Currently we are running 235 Nitto NT-01 tires on 8.5" wide RPF1s. |
Subscribed, Nice to see a few more FC's!
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Great thread, I've seen the 387 FC in person at mid-ohio, It's a well done swap and super clean!
I hope to be in PT soon. Subscribed. |
ST is where its at. man that counting points stuff gets old real quick if you ask me!
http://farm5.static.flickr.com/4033/...9eee3f04_m.jpg |
More details on the ST car? My '87 TII is still "under construction" and we're expecting it to end up in ST1.
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Originally Posted by rob81gsl
(Post 10416750)
ST is where its at. man that counting points stuff gets old real quick if you ask me!
http://farm5.static.flickr.com/4033/...9eee3f04_m.jpg The PT format helps people race that have a budget. |
Originally Posted by Dan Unk
(Post 10417568)
With that being said, counting dollars for replacing cracked downel lands gets real old quickly too. You were making 490hp ;) just to compete in TTU. I think the FC chasis looses out to modern suspension technology, and the corvetts' insane tire width allowance.
The PT format helps people race that have a budget. I dont thing st costs that much more to race. the only real difference is the tire budget and wearing of expendable parts faster and a LOT more fuel. the chassis build is almost the same just requires a few things to be beefed up to take the forces. |
Originally Posted by wlfpkrcn
(Post 10415289)
Rock Lobster
https://www.rx7club.com/attachment.p...4&d=1285092234 9 months ago this was a bone stock, automatic, 1989 GTU with an anemic engine (non functional VDI and aux ports). We completly tore the car down, just about every nut and bolt and built what you see here. I have had very little time to document the build but i hope this winter to take pics and do some writeup. First thanks to my friends GooRoo, Damian, and benandersonracing.com it makes all of it worth it to race and build with you guys... Some build highlights: - Pineapple Stock Port Series 5 Race motor (stage 3 oil mods). Built from almost all new parts, the only used parts were the rotors and the e-shaft. Wired open VDI and aux ports. - Pineapple rebuilt series 4 transmission with custom trany mount for auto chassis (1986 gears) - Stance 8k/6k coilovers - Stock Sway bars - Full Corksport 2.5" exhaust with headers - Rtek 2.0 -Fully rewired. The engine harness, front harness and rear harness were completly removed and new circuits were wired and harnessed from scratch. Only the stock emissions harness was used and half the wires were pulled out of it. - Depowered 15.1:1 rack. - Removed A/C - removed Dash and all equipment underneath - Fuel tank empty with no driver, full stock glass and steel body panels the car weighs in at 2300lbs. - All emissions removed - Bone stock fuel system (no issues and no fuel starvation until down to about 3-4 gal in the tank) - Miata Torsen Rear end with various gear ratios (4.1, 4.3, and 5.12) is what we will run depending on which track we are at. - Aluminum flywheel and driveshaft - 6-pot wilwood front brakes with 2-piece rotors and rs/rz rear brake rotors -Currently we are running 235 Nitto NT-01 tires on 8.5" wide RPF1s. 7 - Tires 6 - Suspension (inverted aftermarket shocks and springs) 3 - LSD 5 - Exhaust 2 - Brakes 16 - Weight Reduction (Race Weight is currently 2570 or greater) Under Free Mods: "OEM ECU/PCM reprogramming via reflashing or replacement/aftermarket ROM chips or simple ROM boards (The OEM ECU/PCM box/housing and hardware must be used)." Since the Rtek is a simple ROM board that in effect reprograms the stock fuel and timing maps, it is free.... |
Originally Posted by wlfpkrcn
(Post 10415286)
Tinner
http://i157.photobucket.com/albums/t..._ver1-6069.jpg My base class is PTD as a TII with an engine swap, dyno classed at 185rwhp at 2850lbs. +8 tires, 255 RA1, base tire in PTD is 245 +3 shocks +1 inverted shocks, the Stance coilover front struts are inverted +2 springs +2 sway bars +3 air dam BTW guys with the new ruleset we can run a depowered 15:1 rack or really any other ratio rack...(we ran it last year illegally, as i had thought removal of power steering was free when i built the car) |
Originally Posted by RockLobster
(Post 10423898)
I like that approach, allowing brakes of the TII at no points. Technically you could run the North American spec TurboII S5 Aero as it was all base stock for 89-91 turbo cars.
BTW guys with the new ruleset we can run a depowered 15:1 rack or really any other ratio rack...(we ran it last year illegally, as i had thought removal of power steering was free when i built the car) I was under the impression the power steering removal was always free, just a change in steering ratio cost points. |
Originally Posted by tinner
(Post 10423925)
I was under the impression the power steering removal was always free, just a change in steering ratio cost points.
BTW finally an interesting thread on here. First one in some time....lol |
Originally Posted by RockLobster
(Post 10423898)
I like that approach, allowing brakes and LSD of the TII at no points. Technically you could run the North American spec TurboII S5 Aero as it was all base stock for 89-91 turbo cars. You could also run either the stock S4 clutch or the S5 viscous LSD.
BTW guys with the new ruleset we can run a depowered 15:1 rack or really any other ratio rack...(we ran it last year illegally, as i had thought removal of power steering was free when i built the car) What side skirts are on that car? |
We gotta get SCCAITS to weigh in with his B built (or is it A now?). He has the transmission we all want....
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How do you like the Rtek? We really need to dump the stock ECU and have limited budget. Are you getting good results without the fuel pressure regulator?
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Originally Posted by RockLobster
(Post 10424274)
We gotta get SCCAITS to weigh in with his B built (or is it A now?). He has the transmission we all want....
Haven't even looked at the points as I have no plans to run any NASA events this year. Unfortunately PT is dead in TX and racing yourself sucks. Last NASA event was March 2010. The car has progressed from ITS - ITE - PTD - PTC - PTB - EP. I plan on staying in EP for awhile as our car counts are good and Mazda/Hoosier both pay very well. |
Originally Posted by wlfpkrcn
(Post 10424426)
How do you like the Rtek? We really need to dump the stock ECU and have limited budget. Are you getting good results without the fuel pressure regulator?
EDIT: The other thing we changed was the fuel pressure vac switch got removed, thus the stock regulator sees full vacuum all the time now. |
Originally Posted by SCCAITS
(Post 10424756)
Sorry guys, went back to SCCA and built the car to try and win National EP races. Many more cars in the class and much more contingency there.
Haven't even looked at the points as I have no plans to run any NASA events this year. Unfortunately PT is dead in TX and racing yourself sucks. Last NASA event was March 2010. The car has progressed from ITS - ITE - PTD - PTC - PTB - EP. I plan on staying in EP for awhile as our car counts are good and Mazda/Hoosier both pay very well. Good luck either way... |
Have you seen the 3.8l Buick V6 powered FC that will be running PTD. There is a thread on NoRotors.com. The site seems to be down this morning. I'll post a link when it comes back.
Steve |
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Originally Posted by Dan Unk
(Post 10417568)
With that being said, counting dollars for replacing cracked downel lands gets real old quickly too.
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Originally Posted by rob81gsl
(Post 10416750)
ST is where its at. man that counting points stuff gets old real quick if you ask me!
http://farm5.static.flickr.com/4033/...9eee3f04_m.jpg I ran my legends car in STR2 these last couple seasons in NASA MW (im the orange one). A half page long core rule set with none of those funny "intent" arguements makes me think the next time my FB comes out it'll have ST on the side lol |
Where would you run the 4.3 or 4.1?
With a stockish tire circumference of 78 inches, the 5.12 is good for 152-166 mph in 5th gear @ 8000 rpm (depending on whether you have the .697, 0.711, or 0.758 gear). Even on long straights (e.g. California Speedway's 0.6 mile front straight), is that speed achievable in a PTD or ITS car? The 4.3 will get you 137 mph @ 8000 rpm in 4th....
Originally Posted by wlfpkrcn
(Post 10415289)
Rock Lobster
- Miata Torsen Rear end with various gear ratios (4.1, 4.3, and 5.12) is what we will run depending on which track we are at. |
1 Attachment(s)
Originally Posted by 088
(Post 10431858)
With a stockish tire circumference of 78 inches, the 5.12 is good for 152-166 mph in 5th gear @ 8000 rpm (depending on whether you have the .697, 0.711, or 0.758 gear).
Even on long straights (e.g. California Speedway's 0.6 mile front straight), is that speed achievable in a PTD or ITS car? |
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