2JZGTE E32 Conversion

[Nath]

great idea, love the 2j

how much is the 2j more then the 1j? i was quoteed about 6k for halfcut for 2j, but only 1000-2k for 1j!

[BMWTurbo]

Depends on what you want (manual/auto) and where you get it...

My 2jz cut is costing around $3k. Auto though. Auto 1jz will be around $2k.

[SRE30]

I will be keeping this engine fairly stock

I think we know you better than that....

[rob101]

I did some sums and with the money saved in fuel I think in less then 5-years the conversion will have paid for itself.

I was stunned to read the city travelling mileage written in the BMW manual was 17.9/100klm... *shudder*

The 0-100kph is rated at 9.1secs also.. :P

Anyways... enough justifying to myself:P

I believe my engine is the B35... has 3.5 written on the manifold.

call me a doubter, but how much fuel do you think the 2jz is going to save you in a 1.8t + body shell? I've looked at the supra's and 735iL's figures and not withstanding the fact that the supra is way lighter. they aren't all that dissimilar, sure the supra seems to have 2L/100 km better city fuel consumption. But i would expect that will evaporate when you add about 300 kg + into the equation.
I don't mean to be a party pooper, I just don't think you'll save much on fuel I could be wrong but thats just my feelings from what i know/read.

[BMWTurbo]

I know Rob.. But I like to justify that to myself :P

A comment from someone with a 2jzgte in an R31 skyline 'I get between 9.9l/100km and 14l/100km depending on driving conditions and how heavy my foot is. According to my MPH and weight my engine makes 460hp"

Also need to factor in that babying and nursing the 7 around hasn't netted me any better then 20L/100klm... and driving smoothly on the highway I can only average 12-13 at best. Now this might be an issue with my oxy sensor or CAT I don't know, but it seems crazy to pour more money into the BMW engine just to 'see' if I can't better the economy, or make the engine as smooth as I want it.

I know how smooth the Toyota engines are, and I really like driving the 7... so again it was the logical step :P

I thought about getting a 750 but have read horror stories about the engines when something goes wrong, so wasn't willing to take that risk.

[rob101]

I thought about getting a 750 but have read horror stories about the engines when something goes wrong, so wasn't willing to take that risk.

well they aren't that bad, however i would suggest considering a 740iL e32 (or 730iL v8? i think there is one in e32) not a 750iL if you want fuel economy.

I think from a challenge and interest perspective its an interesting project. I just think alot of the people who think these are financially viable don't really think it through because compared with changing model to a more expensive and newer bmw as you have: more depreciation on a modified car, more insurance (sometimes), more bullshit, more downtime, more headaches if things go wrong. And I honestly can't see a stock supra engine being noteably more efficient and faster than a 740iL. Thing is turbo engines of this era use fuel, because they run richer than NA and they run on lower compression ratios. My point is that it will be slightly better than a 735iL but will it be better than the m60s especially after factoring in the money you will not instantly lose when you buy an e32 with an m60 (as you do after you modify the car)? I am not so sure about that.
then there is the point that smaller engined e38s are coming below 25k....
but as i said, it'll be a good project, and yeah it won't be outrageously expensive in the end, for the experience it gives you. but there are alternatives.

as for 750iL's think of this, would you like a car that still works when there is a problem, would you like an engine with redundant components that you can swap over until you find the one thats stuffed? thats an m70 for you. its basically 2 totally independant and redundant engines strapped together

[BMWTurbo]

I know what you are saying Rob.. and agree to a point. But with the money I've spent on this car of late, mechanically, and cosmetically and the fact the stereo etc is all done and installed etc. For me to bring it back to stock and sell for $6k or something, I'd be losing out I think.

I'd have to get a really good condition 740i for a good price to be ahead.

I'm not so sure about modified cars and their resale. Being the 2JZGTE and the auro that surrounds it, I'm pretty sure if will value add to the car. With stock examples only fetching single digits the cars seem to have fallen, and there isn't any money in selling them...

To be hoenst if I had the time and didn't just buy new wheels, and all the other little things, I'd sell it and import an Aristo

[rob101]

Yeah fair enough,
btw what is an "Aristo"?

[BMWTurbo]

Rob, just had a look at factory weights.. 735i auto.. 1630kgs... mkiv supra 1540kgs... only 100kgs difference...

An Aristo, is a Japanese 'beefed' up Camry. Toyota, 4-door sedan, similar shape to the Lexus GS300, but comes with the 2jzgte factory.

The front cut I'm getting is of an Aristo.

http://en.wikipedia.org/wiki/Lexus_GS

[rob101]

Rob, just had a look at factory weights.. 735i auto.. 1630kgs... mkiv supra 1540kgs... only 100kgs difference...

An Aristo, is a Japanese 'beefed' up Camry. Toyota, 4-door sedan, similar shape to the Lexus GS300, but comes with the 2jzgte factory.

The front cut I'm getting is of an Aristo.

http://en.wikipedia.org/wiki/Lexus_GS

yeah depends who you believe, this website quotes 1800 kg + http://www.autopower.se/modellguiden/e32.asp
but it depends what standard of weight are they talking kerb, wet, gross or what? 100L of fuel, 80 kg of driver and 10L of fluids can make a fair difference to a car's weigh in.

and yes i do weight 80kg its a side effect of working out too much.

[BMWTurbo]

That is from the 1987 E32 manual...

[rob101]

Interesting, I never knew the difference between the iL and the i was so big in terms of weight. and i guessing from the lack of LAD you have an 735i?

[BMWTurbo]

yeah She's a 735i auto..

BTW those weight are missleading... accross the top it goes... 730 735i 750i 735il 750il

so only 50kgs between i and il

[sparkle]

haha this is so badass. Going to watch this with interest.

[BMWTurbo]

Have just spent a good hour scanning through wiring diagrams etc for the BMW factory equiped modules abnd from what I can see the dash and hence cruise, and other vehicle speed related functinos are all fed from the vehicle speed sensor in the diff (B10 in the schematic).

This should mean the cruise control, trip meter, and other related functions should still work as per normal, with the only connection I need to make is the mechanical one between the cruise motor and the throttlebody.

I was concerned the VSS internally in the gearbox might be used for these functions, but I think it will be okay

I'm also going to look into the compatibility of the BMW Wheel/ABS speed sensors and thier intergration to the Toyota Traction control. Not that I'd ever use it, but it would be cool to be able to almost entirely integrate with it.

I'm pretty certain I will lose the fuel consumption readings.. however I'll have a look into this at a later date, I might be able to build a PIC circuit to interface and have these work, based on injector pulse etc. It could possibly be as simple as connecting a single injector feed into it so it can reference injector duty, but this would require a calibration to be correct.