marlin

Well then I will remove it and allow for better fit of air cleaner. Assuming no lower clearance issues. More concerned with low end performance than top end. How often are we at the top end anyway? Thanks for the education. Knew there was a reason I joined up with this bunch.

I had new shafts made for my Mazda build, rated to 600 hp. Never liked the idea of friction weld of driveline parts. Especially for your V6, it would be the way to go. Supposedly the inner hubs are not removable/replaceable but this is not true and can get you YouTube links for 'how-to' if needed. Speaking of the clip-in type, not sure of the bolt on hubs. Car is not on the road yet so no actual road experience. When that let loose must have caused quite a racket. Any damage to the chassis? Glad your still at it.

lotusPaul; Yes, over carb is a problem with the male species. I didn't want to go to a 2 barrel carb but did add a phenolic spacer to help increase the velocity, as I understand, and help prevent any heat soaking of the carb. Lucky for me I was still able to fit the taller Holley, under the bonnet with my 3" air cleaner. Just barely. I used the mustang convertible motor mounts which sit a bit lower than the tin top mounts. WallerZ; Thanks for pulling us back on topic. I will check with the Haltech tech when he gets back from holiday whether the number makes any difference and/or what number I should use. Will report back results. Thanks all, Marlin

Rambles are good, keeps the natives bored. Even if I did have to google 'off piste'. Rev limiter set at 5500, even though I do bump it occasionally and have to remember "what was that?". Limited fund so don't want to break my toy. Only have seen photos of your cars. The DAX is something else. Chevy in a cobra, tisk, tisk, loss of another over to the darkside. 429 FE, dry sump? Is he planning on pulling stumps out of the ground with that torque? $$$,£££ That is one fun hobby to have. Back to present build; HP pump failure on install/test yesterday. Come to find out no warranty on Walbro pumps. Share the knowledge of my unfortunate discovery. New one on order. System seemed to hold 60 psi for a while before pump death.

Went through the exercise of changing out the dizzy springs to much lighter weight, which made worlds of difference. Most on the FFR forum say the car is too lightweight for the vac. secondaries but that was not my experience or issue. This was the 2nd carb on the car to start flooding through the needle valve. 1st time was during 1st start and under warranty. This time same thing but out of warranty. Same failure for a second time? I don't like being bite 3x. Also got the Holley for free from a good friend, so price was right, just needed rebuild. 302 (306 actually) specs out to a 575 carb on the charts, and this is my street car so it should be fine. Did you own a UK cobra? Which side is the steering on?

302 is carb and MSD box. Some engine mod but nothing extreme, .020 over also (I like to clean up the cylinder walls), Alum heads and intake, mildly aggressive cam but street driveable. Just changed from 650 Edlebrock (vac. secondaries) to 600 Holley DP, should have better throttle response. Optimistic guess ~350 HP. Not as fuel efficient as I had hoped. 3.55 diff., 17" wheels, .64 5th speed, overdrive, even with unbroken egg under right foot hardly getting 20 mpg. Haltech ECU is the 1500. Had to go to the more expensive series for VVT control and knock sensor, which I can't see not using. When purchasing ECU they had a sale of 50% off wide band if purchased at same time. ECU has both the short and long term learning for many functions also. And it has 3 level Diagnosis ability which I found quite surprising. Record, throw-up warning light, put car into limp mode. User settable and OBD2 output capable. More stuff for me to learn during my travels. Will not set any up any at the beginning. Thanks for the interest. Marlin

Yes, Mk 3.1, 302 small block

Well, since I am self learning this EFI stuff all information is held in equal value of importance at this point. This engine volume question maybe insignificant but I didn't know that. Thanks for the education. A good exercise of the gray matter in any event. I am setting up to have a wideband O2, air temp, MAP sensor, TPS sensor and an ECU on-board barometric sensor (in an attempt to compensate for elevation changes). So hopefully will have plenty of control over air density and AFR. But I maybe barking up the wrong tree again? I'm not even sure the ECU uses the engine size, just a box on the setup screen. Will check with a tech at the ECU company (Haltech). Feel free to keep the education flowing in case I maybe missing something important.

You seem to have caught one of my errors. When I ran 0.020" through Google it took it onto itself to convert inch to cubic inch which I had not noticed. Thanks for the catch and save. Gold star in maths for you. Cheers

Well this is all new to me to coming from the era of carb also. But as I understand it the ECU calculations are based on the engine as an air pump. So the ECU calculates the (VE) volumetric efficiency of the pump for fuel and air ratio. Hence, if you put in the most accurate theoretical volume for the engine, in the ECU, it can calculate the best efficiency. It sounds like I know what I'm talking about but actually I'm just parroting what I have read, hardly understanding it all. Yes, close to a dead Polly. My actual confusion is weither the .3277 should be diameter or radius? Does it all really matter, maybe not? Just part of this ol' dog learned something new. Hopefully someone in the know can get us straight. Thanks for the inquiry. Marlin

Hi smart people, Looking to verify the re-sizing of my engine for use in my ECU map. If someone can verify my results it would be appreciated. Started with a 1.8L MX-5 engine. Stock bore 83mm, stroke 85mm = 1839.606cc. Bored cylinders out .020" = .3277cc. So new numbers 83.33 bore, stroke 85mm = 1854.2638cc Used calculator from http://revetec.com/Calculators/Engine_Displacement_Calculator-2.htm but would just like some confirmation. Thanks, Marlin

Great, more professional information like this needed. Chilton's here in the colonies but printed by Haynes.

Mine showed up here in the colonies. Thanks! A glossary of some terms would be helpful for us single eyebrow, low brows over here Maybe something new to start on the forum for us foreigners?

Thanks Richard for the link to David's blog. Just what I was looking for. Marlin

Hi, July/Aug 2014 has an article on Stoneleigh, July/Aug 2015 has an article on GBS Zeros and that was how I got involved with these little gems. Worth a read. Marlin