Manifold

[Pete&Matt]

Has anyone here made their own exhaust manifold before? We have the Toyota 4age engine and Tim didnt come up with anything for supplying one. We could get one done by a company, but at a cost obviously! So am thinking of doing it ourselves.

Where did you get the collectors etc from? We have welding kit etc and i can get the pipe locally.

Cheers

[pfhc]

I didn't construct the manifold for my 4age engine as Peter Powell supplied mine. At the time if I remember correctly Mel from Raw was able to supply a manifold plate to join to. If you want any pics of mine let me know and I will try and take something meaning full

Peter

[Pete&Matt]

the manifold plate is not so much of an issue as we have the original manifold to make a template from.

Would it be pos to do some pics and rough dims of yours?

[pfhc]

Well I have tried to get some pics!!! not the easiest place to photograph.

The pipes come from the head until they are over the chassis rail and then come together in a bundle running along the rail until they join together in the 4 way collector. As best I can measure they are all around 30" from the block to the start of the collector.

Hope this helps

Peter

[Pete&Matt]

Thank you very much Pete. Our other option is to get a RAW manifold, now i know how far it needs to come out gives me a good start. However, at £225 im a little put off, especially as we will probally end up having to cut and shut it

[Werner Van Loock]

I'll check in the garage on the striker, it has a Raw 4age exhaust on it

[Werner Van Loock]

here it is, don't think that even with a cut and shut it would fit

measurements are in cm, don't use any imperial measurements here

front view

overview

top measurement in cm (1inch = 2,54cm)

height measurement in cm

[Pete&Matt]

many thanks Werner. It is like i thought it is, has a shallower "throw" from the head itself as it doesnt have so much distance to travel. Looks like that option is out then!

Are you running carbs on it? If so, what ones and size? Might want some info from you on the weber choke sizes etc if you are

[Werner Van Loock]

I know it are Dellorto DHLA carbs, but that's about it.

But everything depends on the engine. Mine is a 7 rib block with 20mm gudgeon piston cooling conrods/42mm conrod big end, small port high 10.3 compression head.

While most are 3 rib block 18mm gudgeon non piston cooling conrods/40mm conrod big end engines with bigport (TVIS) low 9.4 compression head engines.

3rib block (high revving bottom end)

7rib block (stronger bottom end)

Small port

Big port


Some interesting links:

http://www.club4ag.com/technical_main.htm
http://www.geocities.com/MotorCity/Garage/8422/4age.htm
http://www.billzilla.org/4agstock.htm
http://www.billzilla.org/4agmods.htm
http://www.technotoytuning.com/
http://www.nonstoptuning.com/pKitToyCor.htm

[Pete&Matt]

we have the early 4age with the large port head. originally had the TVIS system on it. Will use it to begin with, then once on the road and funds allow go to the 20v engine with injection etc.

[pfhc]

Certainly can't fault your logic going to a 20v. I've had one in mine from the start and rate it very highly. Great little engine. Throttle bodies put it on electronic ignition omex or some such and mine runs around 145bhp @ the flywheel and limited to 7800. Raw have a very nice, if a little expensive supercharged version with something a little over 210bhp. I would love to put it in mine, but I think her who has to be obeyed whould have something to say about it

[Werner Van Loock]

20V engine is a very nice one to have in a road car, but not very good at racing.

when funds allow, i'll be building a 16v with 7rib block with the strong balanced bottom end using steel conrods and forged high compression pocketed pistons, high pressure oil pump and a flowed smallport head with some wild cams and heavy duty valve springs breathing through throttle bodies and should give around 180ish bhp

[stylussprinter]

They go pop / oil starvation if pushed on track . Don't see them in the 750 club racing kits
The first engine for the RT developement was a 4age. Popped during first practice so Tim didn't get a race out of it for the kit car racing. After the second rebuild to try again it popped -- so out it came in favour of the Duratec which has never put a foot wrong. Sadley the finance wasn't there to race again or we'd have seen some fun amongst the usual front runners . Tim would have surprised a few with his driving ability

[Pete&Matt]

i know Tim had issues with his early on. Ours is only intended for road and occasional track use so wont be a prob. They are a good little engine though. nice and light etc!

[stylussprinter]

i know Tim had issues with his early on. Ours is only intended for road and occasional track use so wont be a prob. They are a good little engine though. nice and light etc!

A very cheap '' belt & braces '' approach would be to use ZX1 Extralube in the engine oil as I've done for 4 yrs . Saves the day under high stress situations without drama. Read through the info on their website regarding it's structure and method
When Dunnell refreshed my engine before the power jump he told me he could see no wear at all and put the shells back in ---- it had raced for 7 yrs