Questions on Header and Brake Pads

[O Racer]

I am the original owner of a 1992 Caterham Super Sprint with 1700cc Crossflow engine, 5 speed transmnission and DeDion rear end, long cockpit version. It has been street driven and used in track days, more recently more track days than street travel, it has low mileage, around 12,000 miles last I looked.

I am just finishing a major rebuild and upgrade to the engine: 45mm Webers, roller rockers, bigger valves, A6 Cam, CP forged pistons (84mm, 11.5:1 CR), SCAT Crank, lightened flywheel, dry sump and Comp 4 to 1 header.

I have a couple questions now, maybe more later:

RE: Header The original header was the 'stock' 4 - 2 - 1 header exiting the body on the drivers side. My new header is the Caterham part Comp 4 - 1 header with the collector outside the body. My question, does anyone know how much to enlarge the hole in the body, does the hole center stay concentric or is it offset in any direction? With the engine installed (not currently) fitting the pipes one at a time may not be obvious and enlarging the hole an exact science. Any help here or a way to figure it out.

RE: Brake Pads The current pads are stock as delivered, any suggestions for a pad more suitable to track use? From what cars (make/model) did Caterham source the calipers from?

Thanks for all your help and suggestions

John

[O Racer]

Has anyone fitted a 4-1 Comp Header to a Seven like mine that was delivered with a 4-2-1 header?

 

I am concerned that the diagonal chassis brace might interfere, anyone with experience with this?

 

I have also looked online and could not even find an early 90's Seven with this header...Help!

[Zona]

You did the rebuild and upgrade to the engine really great, what about the chassis brace can you fix it.

[O Racer]

Zona My posts were in advance of the engine installation which is very close now...I have yet to try to fit the header but recently I did a cardboard mock up of the engine in relation to the header exit hole which was not much help other to indicate the hole will need be elongated as the pipes exit the body diagonally. I have yet to determine if the chassis brace will clear the header.

 

Can anyone provide a photo or two that shows the installation preferably one from inside the engine compartment. Thanks

[James A]

If you can post pictures of the brake calipers I may be able to help you with the make of car they are from.

[CASwede]

I believe stock Super Sprints used Spitfire two pot calipers up front, Sierra single slider on the back.

[O Racer]

Thanks James and CASwede, I will take a photo and see if I can post it here. Never done that before.

[TheDingo8MyBaby]

http://i.imgur.com/wv0A8J2.jpg

 

Is that photo helpful?

 

I agree that the super sprints use the type 14 calipers as used on spitfires.

 

Do you happen to post on BAT often, by any chance?

[O Racer]

Dingo, yes, thanks so much for your reply and photo. Questions:

 

Did your Seven come with the 4-1 header or did you fit it yourself?

 

Do the four down pipes clear the diagonal chassis brace?

 

Is the hole in the skin round, oblong or...?

 

Two Photos of the pipes exiting the skin from inside and outside the body would help.

 

Yes I am a BaT faithful for about 3 years, I comment when I think I have something to add and sometimes to voice my exasperation or frustration on a car or topic.

 

If you want to go offsite, email me at jgrosseto at iCloud dot com. It would be easier for me to send photos.

 

Thanks

 

John