Author Topic: My 4-door build (Read 7452 times)

EducatedFool · « **on:** April 06, 2007, 11:20:55 PM »

I've got some pretty big plans for my E30. Car will be tracked as often as possible. I've got a pretty good idea what's going to be done as far as wheels + tires, suspension, and brakes, but as far as the engine goes.... still not decided. Mainly because I don't have much experience w/ engine building. I know that I want the Downings Atlanta S/C kit when it finally comes out. But I want a little more than the 180whp that GRM got, maybe 200. My question is, what exactly should i do to achieve this power? Also, I have most of the basic tools, but what special tools will I need to work on the engine? I will be documenting my progress here. Wish me luck!

nobrakese36 · « **Reply #1 on:** April 07, 2007, 12:11:58 AM »

snap on torque wrench ftw!

EducatedFool · « **Reply #2 on:** April 07, 2007, 01:33:18 AM »

lol i figured id need one of those

and a manual would help also. the bentley manual, does it have for the M42 too? Cause I noticed alot of the E30 manuals don't mention it at all.

jpod999 · « **Reply #3 on:** April 07, 2007, 02:07:08 AM »

If you go with a DASC then I would also upgrade some of the internals.

EducatedFool · « **Reply #4 on:** April 07, 2007, 02:32:59 AM »

i was also thinking megasquirt and an LSD. which LSD would be best for street/track use?

EducatedFool · « **Reply #5 on:** April 09, 2007, 09:57:07 PM »

also, what is the most i should expect if i decided to keep it N/A and build it up for high compression? and still be streetable?

jetteman · « **Reply #6 on:** April 09, 2007, 10:25:11 PM »

as for a NA setup i dont really know, but it would be expensive (screw that). for an lsd i would go with a medium case 4.10 from a m3 or a 89-91 325i auto (the only cars that have a medium case lsd?).

EducatedFool · « **Reply #7 on:** April 10, 2007, 12:35:34 AM »

will probably build it for boost. i wanted to buy Koni's, but the site list 2 different sizes? how do i know which one to get?

EducatedFool · « **Reply #8 on:** April 10, 2007, 05:15:42 PM »

lol im a noob

what would provide a more useable powerband and still provide decent power, a supercharger or turbo? also, how difficult are the 2 compared to each other?

Febi Guibo · « **Reply #9 on:** April 10, 2007, 07:03:31 PM »

Well, in general a supercharger has a wider, always on powerband and is more streetable... There is also a lot less plumbing. There are parasitic losses because it's driven by the engine.

Turbos have more high end power (a lot more given the application) but have more plumbing and cooling requirements.

EducatedFool · « **Reply #10 on:** April 13, 2007, 09:29:08 PM »

If I went w/ a SC build, and wanted more power than a kit would give, what would I have to do?

EducatedFool · « **Reply #11 on:** April 13, 2007, 11:00:50 PM »

And if tried to build my own junkyard turbo kit, what cars should I be looking for to rob a turbo off of?

Tonyb · « **Reply #12 on:** April 14, 2007, 01:40:29 AM »

A stock motor should be fine at the DASC boost level's, as long as the motor is in good condition. I plan on putting one on this summer, and if I blow the motor then I i will swap it for an e36 m42.

Abrax · « **Reply #13 on:** April 16, 2007, 04:47:59 PM »

Quote from: EducatedFool;23741

And if tried to build my own junkyard turbo kit, what cars should I be looking for to rob a turbo off of?

It depends on what kind of power You want to achieve...

T3/T4 turbocharger combined with big intercooler and MS EMS would place You around 250-280HP's but You need to make a lot of changes to intake/exhaust manifolds, C/R etc...

When higher powerlevels are aimed the T3/T4 hybrid becomes too small for the job. But it is not a problem as there are many bigger sollutions available. Sweds aids to use Holset HX35 for M42 or HX40 if the engine rev's higher than stock /8000-9000/. The minus is that below the powerband it would be rather laggy the plus is the powerlevel around 400HP's.

Remember - the bigger turbocharger the longer the response...

But putting a big turbocharger leaves the opportunity to have a streetrod acting very similarly to the stock when below the powerband. Similar in consumption too, and when You need the power, just reduce gear or two and off You go!!!

Supercharger leaves Your engine just as streetable as stock engine with no lag at all. But it raises consumption just everywhere. And the powergain is not as spectacular as with a turbocharger...

EducatedFool · « **Reply #14 on:** April 16, 2007, 09:25:22 PM »

lol im not looking for HUGE power like that, i'd be petrified to go from having 100whp to almost 300

I'm looking to get between 200 - 250 whp. Are there specific cars i should look for in the junkyard that contain components that would help me achieve this goal?