mx5cartalk.com

How stable is CF in high-heat applications?

So the throttles are in that slab of aluminium, I suppose... and where are the injectors? Are they and the throttles in the aluminium piece shown in the photo above? That would be a worry....

I will follow this with interest, quads are definitely on my agenda, just not yet

Want!

Quad throttle bodies being fed by a turbo....dear god dont tempt me haha

Cool. Well I can't afford one, so I'll just have to drool over yours when you get it
how stable is CF when it comes into contact with saliva?

who is the vendor - i am very interested. either that or the begi intake manifold.

Fuzzlet wrote:Quad throttle bodies being fed by a turbo....dear god dont tempt me haha

6 throttles, 2 turbos = stock GTR motor.

...or the stock SR20DET motor out of the Pulsar GTi-R (quad throttle bodies & turbo) which incidentally was available also around the same time (1990-1994 from memory).

Actually it was the pulsar and skyline GT-R engines that made me look into it for my NA SP replica....in the end the cost kinda outweighed it

For a turbo, I doubt the power difference would be that great (although depends on the size of the tb's one uses compared with stock), but the main diff would be same as for someone running N/A - throttle response

you should be able to flow more air through this. I wonder if you could just get an adaptor to bolt it to the head and then bold on a modified single throttle body if you didn't want to go irtb.

16bit wrote:you should be able to flow more air through this. I wonder if you could just get an adaptor to bolt it to the head and then bold on a modified single throttle body if you didn't want to go irtb.

Because the benefit of quad throttles is the volume of air able to be moved quickly into the head - fitting a single throttle infront of it would seriously choke the flow - do the surface area sums on the butterflies...

The easiest thing to improve airflow is buy a bigger throttle body from someone like capa, or get one from another car, and get the stock manifold modified to accept it. If it uses a common TPS, you should be able to splice it into the MX5 ECU.

Quads will give more power, but they will sacrifice some torque if you get the runner and butterfly sizes wrong. For example, 7in runners and 48mm butterflies got my NA motor from 118 to 123rwkw which is minor but it lost torque under 3000 (who cares - it's a race motor), gained torque between 5-7000 and the throttle response was insane so it was highly worthwhile doing properly.

should have been more specific when I said modified - like the guy with the 10ae who i can't remember his name that bored his out to 80mm. apparently that flows 450kw of air - not sure if that is forced potential or na.

16bit wrote:should have been more specific when I said modified - like the guy with the 10ae who i can't remember his name that bored his out to 80mm. apparently that flows 450kw of air - not sure if that is forced potential or na.

Won't matter unless the head can flow it as well.......

Another thing about some multiple throttle designs for RHD MX5s - most foul the brake booster and this one looks like it would too....when I did it, I had the manifolds custom made to clear the booster.

this is a good point.