L28 to 3.0 and above

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status

Well-Known Forum User
Firstly it’s best to decide wot your budget is
Place in Essex I know of will build you an engine to spec,ive got decent spec for this if interested and you don’t need a steel crank if your not going racing that’ll save you 2 k for a start
I’ve got a Rebello 3.2 which is limited to 300 bhp,could’ve got more but how fast do you really want To go and yeah it’s quick off the line also consider fuelling,carbs or TBs,ive got TBs which can possibly give you up to 25 bhp over carbs more once rolling roaded
im Herts based so welcome to come for a blast
 
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dangerZone

Forum User
richiep said:
None of that is particularly special tbh. Of course, the devil is in the details, such as quality of headwork.

What’s described is going to be 220-240hp.

Reference point: my 71 Fairlady ZL has an L28 overbored 1mm, balanced bottom end, ported head (nothing particularly special compared to what I’ve done myself with other heads since), Schneider stage 3 cam (270/280 duration, .460 lift), Dellorto DHLA40s on Harada port matched and polished intake manifold, cold air box setup, Fujitsubo 6-2 header and match twin pipe exhaust, S14a gearbox, 3.9 open diff. Power approx 220-225fwhp.

If you want to go North of that power, it becomes very expensive very fast unless you cheat and go turbo or engine swap. The highly-specced L31 that will be going in my project 240Z will probably have had 10-15k put into it (and that’s mostly at DIY rates) to get 300ish bhp (stuff like billet steel crank worth 3k, welded drag/race spec head, race cam, ITBs, etc.).

It’s possible to build a 3.0-3.1 for less that that, but without ££££ on attention to detail, it won’t get much more power than a sorted 2.8.

Basically, do lots of research here and on hybridz forum. And on the US forums don’t believe the HP claims. US ponies vs British horses…
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Thanks Richie. Do you have any videos of your car?
 
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dangerZone

Forum User
status said:
Firstly it’s best to decide wot your budget is
Place in Essex I know of will build you an engine to spec,ive got decent spec for this if interested and you don’t need a steel crank if your not going racing that’ll save you 2 k for a start
I’ve got a Rebello 3.2 which is limited to 300 bhp,could’ve got more but how fast do you really want To go and yeah it’s quick off the line also consider fuelling,carbs or TBs,ive got TBs which can possibly give you up to 25 bhp over carbs more once rolling roaded
im Herts based so welcome to come for a blast
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Thank you very much that would be great. Sounds like a nice set up you have. Do you have any videos?
 
D

dangerZone

Forum User
Fairlineguy said:
You can’t tell from that video if the car has a lot of hp or just a raspy exhaust note.
What have you got to start with L28 ? Block and head ref numbers ? any usable upgrade I.e exhaust ?
Checkout some of the USA engine builders websites to see the different levels of build/ hp.also Hybridz fourm
Once you have an ideal of the build you want there’s plenty of advice and views on here .
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Thanks for the info, I have a 73 so I'm looking at purchasing a 2.8. I beg to differ though. This car is shifting. Definitely a lot of HP.
 
SeanDezart

SeanDezart

Well-Known Forum User
richiep said:
I said 225fwhp - flywheel hp.

Steel crank = waste of money. Whatever.
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Beg pardon (discreet 'f' in there) :) so a one-eighter, nice.

Yes, unless you're going to run sustained high revs and even then, racing teams have see enormous successes with reliability without.

Good for you - enjoy....at which % of its' potentiel ?
 
SeanDezart

SeanDezart

Well-Known Forum User
Albrecht said:
I think you might be underestimating the effect of his differential ratio. In my experience a diff ratio change is the single best performance adder on these cars.
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Agreed and with Subaru LSDs still commonly available, not 'too' expensive. Next tho is a less strangling exhaust system.:cool:
 
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