Forced induction odd fire?

Renault & Alpine General Discussion

Moderators: eastlmark, BIG_MVS, phildini, Test Moderator, Alpineandy

User avatar
User

Tony Smith

Rank

Non Member

Posts

1407

Joined

Fri Apr 16, 2004 4:50 pm

Location

Kent


Has thanked: 0 time
Been thanked: 19 times

Forced induction odd fire?

Postby Tony Smith » Thu Jul 29, 2010 2:06 pm

I'm still looking for inspiration for an engine for a track/drag GTA and wondered weather it was worth using some forced induction on an odd fire 2.8. I have 2 of these engines (although not sure how good either is). The Venturi 260 used this size anybody know what they did. Wondered what one would go like with some aftermarket injection and a supercharger. What do ya reckon?
Alpines - GTA 3.0 Turbo, GTA 3.0 Inj (Project DD), GTA 6.2 V8 (500 bhp) , R32 Skyline GTR, BMW Alpina B10 635 Highline, Alpina B10 E39 5 Series, Jaguar 4.2 XKR, Laguna 205GT, BMW 120d.
User avatar
User

stephendell

Rank

Club Member

Club Member
Posts

7463

Joined

Wed Apr 14, 2004 7:25 pm

Location

London


Has thanked: 125 times
Been thanked: 102 times

Postby stephendell » Thu Jul 29, 2010 2:23 pm

I believe Mr Faulks has some super duper heads for an atmo project.

Only problem is making sure that the ECU you buy can handle odd fire, not all of them can. (Adaptronic can by the way)
Trafic, Twingo GT, Vel Satis Turbo x 2, Clio V6 Proto Ph2, Vel Satis 3.5, Avantime, Alpine A610, GTA Atmo x 3, GTA Turbo x 3, R5 Gordini Turbo Mid Engine, Alpine A310 4cyl, Alpine A110, Yellow Smart
User avatar
User

si21

Rank

Non Member

Posts

2094

Joined

Mon May 09, 2005 8:24 pm

Location

S.E London


Has thanked: 3 times
Been thanked: 2 times

Odd verses Even

Postby si21 » Thu Jul 29, 2010 3:20 pm

Tony

Mr Faulks advised me that the odd fire has a higher comp ratio than an even fire, so maybe the later even fire PRV would be better suited to forced induction, plus you dont have to worry about the ECU issue either with a wider range of ECU's to choose from.

Si21
no avatar
User

MFaulks

Rank

Non Member

Posts

1552

Joined

Sun Sep 28, 2008 4:25 pm


Has thanked: 45 times
Been thanked: 26 times

Postby MFaulks » Thu Jul 29, 2010 5:16 pm

Hi Tony,

Venturi used the steel even fire crank, but this is available in 2 different stroke lengths to accommodate euro tax categories, and hence the option of the slightly smaller capacity.

I guess it comes down to the category limits of the racing you want to do, this may limit your choices, as you obviously want to be competitive.

As an all out forced induction racer, where you are going to be on max power and max revs for a significant time, the steel crank would be my choice. However, I think the odd fire can be a really nice setup for an atmo until with dual-purpose usage, and pound for pound should be good fun and nice grin factor. Full on race you need to be looking at a cross bolt block and steel even fire crank.

Smiles,
Martin
... A diamond is only a piece of coal that did well under pressure... PRV afflicted, may be I need to squeeze harder!!!!

https://www.facebook.com/maftecfaulks
no avatar
User

MFaulks

Rank

Non Member

Posts

1552

Joined

Sun Sep 28, 2008 4:25 pm


Has thanked: 45 times
Been thanked: 26 times

Postby MFaulks » Thu Jul 29, 2010 11:11 pm

Venturi used the steel even fire crank, but this is available in 2 different stroke lengths to accommodate euro tax categories, and hence the option of the slightly smaller capacity.


.. that and bore size :-)
... A diamond is only a piece of coal that did well under pressure... PRV afflicted, may be I need to squeeze harder!!!!

https://www.facebook.com/maftecfaulks
User avatar
User

Stunned Monkey

Rank

Non Member

Posts

1514

Joined

Tue Apr 12, 2005 12:24 am

Location

Nr Chippenham, Wiltshire


Has thanked: 0 time
Been thanked: 3 times

Postby Stunned Monkey » Sat Jul 31, 2010 10:52 pm

Venturi 260 engine is a Z7U with 73mm crank and bespoke pistons and larger injectors, different ECU. That's about it.
Martin - PRV Tinkerererer
www.delorean.co.uk


  • Advertisement

Who is online

Users browsing this forum: No registered users and 202 guests

Powered by phpBB ® | Renault' and 'Alpine' are trademarks of Renault S.A.S. or its subsidiaries and are used with kind permission of Renault France