SR20DET

Engines, Gearboxes, axles and anything in between

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Re: SR20DET

Postby muller on Fri Jun 03, 2011 11:27 am

Can't comment on the 2ZZ, but to put the 4AGE into perspective.

A good 100% stock blacktop should put about 85kw on the wheels (unadjusted at altitude) on conservative dyno
A mildly worked blacktop with stock cams (flowed, balanced and overbored) will give at most another 5kw on top of that (but probably less)

In A6 spec a blacktop will be good for 9000rpm and give you about 95kw on the wheels (again unadjusted at altitude) but will have a much narrower powerband. I've heard that wilder cams can give good results but I'm not allowed to fiddle with those so can't comment from experience.

The reality is getting 165+Kw NA is not going to be cheap. My personaly suggestion would be to stick a 4AGE in there, and if you are adamant on the 160kw target fit a 4AGZE with a small hair dryer.

To add to Andre's comments, Japanese are known to be rather optimistic with the power claims hence him saying Japanese horses are smaller.

Also remember that dyno charts quoting flywheel power is nothing more than educated guesswork. More than one car has been "tuned" into a "monster" by simply adjusting the dyno parameters. The only way to accurately establish a flywheel number is with an engine Dyno.
Anton

Race car 1: Birkin IRS 4AGE 20v (TLR class B - B10)
Race car 2: Birkin IRS 4AGE 20v (TLR Class B for SO - B20)
Road car: erm.. who cares
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Re: SR20DET

Postby 7ish on Sat Jun 04, 2011 11:41 am

Thanks again for all the info guys. Really good to get these types of insights long before I get to actually sourcing an engine.
Not the first time I've heard that Japanese HP claims are optimistic...

yeah the dynos calculate flywheel HP by letting the engine "run down" and then work out the transmission losses; and then subtract that. right? That's what I remember James May saying Top Gear once.

I reckon I'll suck it up and go for the 2ZZ. I'm tempted to go the 4AGE route with the reassurance of everyone here's experience and knowledge, but I know I'll never get round to changing it once it's in... Also, it's nice to have something a bit different :)

Really can't wait to start getting my hands dirty - literally. Looks like I'll only be starting the build in Oct/Nov. Been wanting to build a 7 for probably 10 years now!

Thanks again for everyone's input :D
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Re: SR20DET

Postby kalfiekind on Wed Aug 03, 2011 10:38 am

a 2liter zetec can make 150 kw with some work

1. Replace all bolts with proper studs
2. Proper gassflow on head
3. bigger valves
4. valve springs and retainers
5. throttle bodies
6. 287 cams

tuning

search zetec tuning

zetecinside.kom
zetec-cat.c0.england
Finally getting to start planning a build.
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Re: SR20DET

Postby Zex on Thu Aug 04, 2011 2:16 pm

I am in a similar situation deciding between a Honda k20A, Toyota 2zzge or duratec HE. It will be fitted to a birkin IRS.
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Re: SR20DET

Postby K24-Mark on Thu Aug 11, 2011 10:30 pm

Zex wrote:I am in a similar situation deciding between a Honda k20A, Toyota 2zzge or duratec HE. It will be fitted to a birkin IRS.


The Honda k24a3 makes 150kw factory and can be fitted onto a W series Toyota transmission with a MMS bellhousing off the shelf.

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Re: SR20DET

Postby muller on Fri Aug 12, 2011 12:05 pm

W series transmission is going to be a tight fit into a Birkin chassis!
Anton

Race car 1: Birkin IRS 4AGE 20v (TLR class B - B10)
Race car 2: Birkin IRS 4AGE 20v (TLR Class B for SO - B20)
Road car: erm.. who cares
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Re: SR20DET

Postby Zex on Fri Aug 12, 2011 2:14 pm

I purchased a k20z motor. I will have to check the space available when my chassis arrives in 3 weeks. I'm really not keen to cut up a new chassis.
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Re: SR20DET

Postby K24-Mark on Thu Aug 18, 2011 11:06 am

Zex wrote:I purchased a k20z motor. I will have to check the space available when my chassis arrives in 3 weeks. I'm really not keen to cut up a new chassis.


I have done a few of these k - w58 cars , let me know if you want some help. my k24 makes over 300hp on wheels normally aspirated.

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Re: SR20DET

Postby Frank the Tank on Thu Oct 22, 2015 11:38 am

Zex wrote:I purchased a k20z motor. I will have to check the space available when my chassis arrives in 3 weeks. I'm really not keen to cut up a new chassis.


Did you manage to finish your build with the K20 motor? If so, how did it go?
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