1.8 na Cold start?

BPT-UTE · Post by **BPT-UTE** » Fri Nov 20, 2009 3:34 pm

Hi guys ive just got a 1.8 Bp inlet manifold off a na mx5. on the manifold itself it doesnt seem to have a coldstart at all, i was looking at a 1.6 manifold which is very simular and they run theres in a obvios spot but the 1.8 dosnt seem to run one? any help would be greatfull.
thanks Jordan

Euen · Post by **Euen** » Fri Nov 20, 2009 5:07 pm

The MX5 BP doesn't have a "cold start" however it does have an idle speed controller which is mounted under the throttle body.

sprsta · Post by **sprsta** » Fri Nov 20, 2009 6:09 pm

how does it work when you swap a 1.6-1.8? as far as i know you can, as long as you keep the 1.6 t/b. what happens with the isc then while using the original ecu
probably could search this myself just want to see what you guys think

cole

Habanero666 · Post by **Habanero666** » Fri Nov 20, 2009 8:37 pm

Search this yo self hahaha.

Nah just kidding, good question!

sprsta · Post by **sprsta** » Fri Nov 20, 2009 8:51 pm

whatch out jim i have had acouple

Habanero666 · Post by **Habanero666** » Fri Nov 20, 2009 9:28 pm

I can tell by the typos

dynofiend · Post by **dynofiend** » Fri Nov 20, 2009 9:33 pm

If youre doing a 1.6 - 1.8 swap, dont worry about the idle control.

http://www.flyinmiata.com/tech/1.8_conversion.php

sprsta · Post by **sprsta** » Fri Nov 20, 2009 10:02 pm

mate typos are my thing im good at it and i will continue to do so
notice i dont use capitals or too much punctuation

Habanero666 · Post by **Habanero666** » Fri Nov 20, 2009 10:37 pm

bump.

BPT-UTE · Post by **BPT-UTE** » Sun Nov 22, 2009 1:15 pm

ohh so it work all off the throttle body. thanks guys
anyone make coolant relocation kits here? need a spacer for the housing for the back of the motor

Euen · Post by **Euen** » Sun Nov 22, 2009 8:45 pm

I've done one. I will see if I can find the dimensions of the spacer. There is a description of my one in this thread.
http://www.mx5forum.co.nz/viewtopic.php?t=9108

BPT-UTE · Post by **BPT-UTE** » Mon Nov 23, 2009 2:45 am

i see the way youve run yours the way i want to do mine is rotate that housing 180 degrees and run it under the intake manifold instead of over the hot exhaust

Euen · Post by **Euen** » Mon Nov 23, 2009 9:50 am

The same principles apply, you just rotate the thermostat housing. The pipe routing may be a little more fiddly as you have the oil filter and alternator etc under there but I know a lot of the guys in the states have done it that way.

I was thinking of getting a few of the spacer plates made but haven't had a chance to do anything about it yet.

BPT-UTE · Post by **BPT-UTE** » Tue Nov 24, 2009 12:24 am

oh yip sweet as. speaking of oil cooler. as im using a stock GTX/GTR one where do i route those 2 pipes?

BPT-UTE · Post by **BPT-UTE** » Thu Nov 26, 2009 3:34 am

do mx5 BP's run the same oil cooler?

sprsta · Post by **sprsta** » Thu Nov 26, 2009 7:14 am

no oil cooler on mx5. should be able to use the gtx one though

Euen · Post by **Euen** » Thu Nov 26, 2009 9:49 am

The MX5 has a sandwich chamber between the oil filter and the block which carries cooling water. On the BP this is fed from small hoses off the thermostat housing, via the idle speed controller, and then returns to the back of the block. If you want to run an external cooler you can either fit a sandwich plate behind the filter (difficult as there is not much room, or just fit a take off plate and remotely mount the filter on the firewall or inner guard.

BPT-UTE · Post by **BPT-UTE** » Sat Nov 28, 2009 1:10 am

yes i know that but what about the other pipe off it? on the fwd bp's they run to the heater core

Euen · Post by **Euen** » Sat Nov 28, 2009 11:24 am

Not quite sure what you mean by the "other pipe". There are 2 pipes into the cooler block, one comes from the throttle body and the other returns to a spiggot on the back of the head.

BPT-UTE · Post by **BPT-UTE** » Sun Nov 29, 2009 3:06 am

ohh ok they dont run to the throttle body on the GTX/GTR coolers. they run to the heater core and to the back of the head as seen on this pic
http://users.telenet.be/miata/images/co ... oling1.jpg

BPT-UTE · Post by **BPT-UTE** » Wed Dec 02, 2009 1:52 am

bump*

BPT-UTE · Post by **BPT-UTE** » Sat Dec 12, 2009 5:19 am

anyone?

Euen · Post by **Euen** » Sun Dec 13, 2009 10:12 pm

Sorry, thought we had covered off your query. What info are you still looking for?

E

BPT-UTE · Post by **BPT-UTE** » Mon Dec 14, 2009 5:08 am

read a few posts above and go to that link to the pic

1.8 na Cold start?

1.8 na Cold start?

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