Race Car Tech Discuss anything related to road racing and auto X.

monster 20b turbo rx7 roadracer!

Thread Tools
 
Search this Thread
 
Old Apr 14, 2010 | 12:35 PM
  #1  
racingdriver's Avatar
Thread Starter
Senior Member
Tenured Member: 15 Years
 
Joined: Jan 2006
Posts: 475
Likes: 30
From: nanaimo
monster 20b turbo rx7 roadracer!

here is what my 93 rx7 will look like for the 2010 season on youtube . Yes , its still street legal. i have included some naration of the modifications.

if someone can link it that would be super.

search you tube : forcefedracing mazda 2010
Reply
Old Apr 14, 2010 | 03:58 PM
  #2  
Brent Dalton's Avatar
Sua Sponte
Tenured Member: 20 Years
Liked
iTrader: (31)
 
Joined: Aug 2001
Posts: 3,125
Likes: 9
From: Germany
that search doesn't come up with any results. I did find the "forcefedracing" channel on youtube, but the newest video was uploaded a year ago.
Reply
Old Apr 14, 2010 | 11:01 PM
  #3  
Gadd's Avatar
Warming the planet.
Tenured Member 20 Years
 
Joined: Dec 2004
Posts: 845
Likes: 2
From: Chico, CA
Found it.

http://www.youtube.com/watch?v=m4tTpR6u-8I

Nice car, keep us up dated

Paul
Reply
Old Apr 15, 2010 | 10:08 PM
  #4  
racingdriver's Avatar
Thread Starter
Senior Member
Tenured Member: 15 Years
 
Joined: Jan 2006
Posts: 475
Likes: 30
From: nanaimo
thanks for posting paul.

I've raced against ross bentley. he's as great guy and excellent driver.
Reply
Old Apr 16, 2010 | 12:03 AM
  #5  
turbotoaster's Avatar
Full Member
 
Joined: Apr 2009
Posts: 208
Likes: 0
From: England
cool little video, interesting setup and some BIG tyres on the back! how do you find the balance?
Reply
Old Apr 16, 2010 | 07:52 PM
  #6  
racingdriver's Avatar
Thread Starter
Senior Member
Tenured Member: 15 Years
 
Joined: Jan 2006
Posts: 475
Likes: 30
From: nanaimo
They are new for this year so i can't say. mazda ran the same width in their 1991 imsa GTO rx7 so it should work.

I ran 13 inch rears with 12 inch fronts last year and i needed more rear grip so i hope this set up will improve lap times considerably. on youtube type: ccgp 2009 and you can see some in car footage.
Reply
Old Apr 18, 2010 | 07:41 PM
  #7  
BigAl...'s Avatar
Love your Fabricator!
Tenured Member: 20 Years
 
Joined: Sep 2004
Posts: 353
Likes: 0
From: Miami, FL
you say you have a Jerico tranny, which one 4 or 5 speed? any idea of the ratios?

BigAl...
Reply
Old Apr 18, 2010 | 11:16 PM
  #8  
racingdriver's Avatar
Thread Starter
Senior Member
Tenured Member: 15 Years
 
Joined: Jan 2006
Posts: 475
Likes: 30
From: nanaimo
the main problem with jerico is top gear , be it 4th or 5th , will always be one to one. so this limits your top speed unless you change the diff from track to track. with my tall tires i think its around 260 km/h. but it is bulletproof and good value for money. one day i will replace it with a hewland mve.

here are my ratios which work well. my rear tire is 27-28 inches tall, and i run a 3.9 and 4.1 rear end.

2.61
1.9
1.56
1.23
1.0
Reply
Old Apr 19, 2010 | 01:39 PM
  #9  
TrentO's Avatar
Senior Member
Tenured Member 20 Years
 
Joined: Jul 2003
Posts: 408
Likes: 1
From: Edmonton, AB, Canada
Hey Wouter. Those are quite the slicks on the back. Are they the Goodyear radials?
I always through you had the Jericho 5 speed.
Is moving the 20B back new for this year?
My dog Box T5 has a slight overdrive (.90) fifth gear and with the shorter tires and 4.10 gears I calc my top end at 165 mph.
Last year at the Indy I could hit 103 mph on the first half of the front straight and 128 mph on the second half.
I figure in Calgary at race city I might see in to the 145-150 mph range, which is still leaving a fair bit of room.

You coming to the Indy again this year?
I've got some theories on my issues out from last year and I've made some changes and planned some other to cure the problems. so I should be better able to run hard in GT2.

cheers,
-Trent
Reply
Old Apr 20, 2010 | 01:43 AM
  #10  
racingdriver's Avatar
Thread Starter
Senior Member
Tenured Member: 15 Years
 
Joined: Jan 2006
Posts: 475
Likes: 30
From: nanaimo
yes , radial goodyears. i plan to try the michelins as well, 370 rears, 330 fronts are the equal equivalent. I did the 20b swap in 07 and it was always set back. New for this year is the steering quickener( 1.9 turns with power) , the aluminum rad support, new ducts, new body in rear, new wheels and tires, rear brake ducts, more front camber with aluminum offset upper control arm bushings, new ic location, tranny cooler, reshaped rear wheel well to fit those tires, new breather for crankcase, and the splitter and diffuser .

As far as this years indy, my participation obviously depends on the hosting club. Based on last years exclusion i have a feeling they may not be members of the wouter b. fan club.

One car that will probably be there is my friend Jack from Vancouver. He has built a 93 rx7 chassis with a 7 litre ls7 motor, tremek, all carbon body, my rear fender flares, super gutted chassis, air jacks, , slicks 330, 280's, . 6 piston calipers, truly the best of a lot of equipment. A very professional build and a fast driver. He won the vancouver invitational years ago.

wb
Reply
Old Apr 20, 2010 | 10:28 AM
  #11  
jkstill's Avatar
Searching for 10th's
Tenured Member: 20 Years
Liked
Loved
Community Favorite
iTrader: (11)
 
Joined: May 2002
Posts: 2,279
Likes: 42
From: Portland OR
Originally Posted by racingdriver
New for this year is the steering quickener( 1.9 turns with power) ,... aluminum offset upper control arm bushings,
Got any pics and/or details on how you mounted the quickener?

Also, which bushings did you use on the upper control arms?
Reply
Old Apr 20, 2010 | 11:38 AM
  #12  
TrentO's Avatar
Senior Member
Tenured Member 20 Years
 
Joined: Jul 2003
Posts: 408
Likes: 1
From: Edmonton, AB, Canada
I think the organizers were put on the spot by the Indy guys and had to make a call. They got a lot of heat over the oil the NSX put down in the practice and the Indy fellows were riding them hard. I heard them talking about it and they sounded like they were members of your fan club. I think you should come out. Send in your application at the least and see what happens.

-Trent
Reply
Old Apr 20, 2010 | 12:36 PM
  #13  
RX-Heven's Avatar
I'll blow it up real good
Tenured Member 15 Years
iTrader: (1)
 
Joined: May 2001
Posts: 2,390
Likes: 2
From: San Francisco, CA
Originally Posted by racingdriver
New for this year is the... new breather for crankcase....
What/ how did you do it? Were you having problems with oil puking into thecatch can before your fix and how is it now?
Reply
Old Apr 20, 2010 | 04:32 PM
  #14  
racingdriver's Avatar
Thread Starter
Senior Member
Tenured Member: 15 Years
 
Joined: Jan 2006
Posts: 475
Likes: 30
From: nanaimo
the steering quickener is a coleman unit, 1.5 to 1, and i cut out the length of it from the steering column in the car. i attached it with some coleman steering couplers and had it set up true and welded at a machine shop.

for the bushings i had the jimlab ones and had a machine shop make a set out of aluminum but with the centre hole set inwards. Then we pinned it so it wouldn't rotate, and added grease nipples.

I have only had oil blowing out of the breather when we went to tracks with a lot of right hand turns as the oil would shift to the left of the engine. And thats with a dry sump! i ran some 1/2 inch aluminum tube from the turbo oil return at the rear of the motor as a 2 nd breather. when its time to open the engine i will drill a hole and add a breather out of the front cover as well.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Sobr609
20B Forum
8
Feb 11, 2019 03:19 PM
cam_7779
2nd Generation Specific (1986-1992)
9
Aug 18, 2015 07:48 AM
Turblown
Single Turbo RX-7's
0
Aug 14, 2015 04:48 PM
KAL797
Test Area 51
0
Aug 11, 2015 03:47 PM




All times are GMT -5. The time now is 07:40 PM.