Memory lane, 2004 Options

[Blue6]

was moving into my new garage/shop and found some old racing memories. Earned me a checkered that day, but had a home track advantage. (IMG:style_emoticons/default/driving.gif)

[ChrisFoley]

Hmm, I had a pretty good year on track in 2004.
These are from the NARRC Runoffs at LRP in Sept that year

[Charles Freeborn]

Hmm, I had a pretty good year on track in 2004.
These are from the NARRC Runoffs at LRP in Sept that year

What would the engine specs be now-a-days to compete in FP? I'm thinking on building a spare that would qualify. Current one would not (by a long shot).

By my reading it seems that one would have to maintain 94/72 and run 40mm Webers or Del's. Beyond that it seems pretty much any mods would fly - i.e. head work, big valves, etc. Not sure about ignition restrictions, but I'm guessing it would still have to run a distributor?

[ChrisFoley]

What would the engine specs be now-a-days to compete in FP? I'm thinking on building a spare that would qualify. Current one would not (by a long shot).

By my reading it seems that one would have to maintain 94/72 and run 40mm Webers or Del's. Beyond that it seems pretty much any mods would fly - i.e. head work, big valves, etc. Not sure about ignition restrictions, but I'm guessing it would still have to run a distributor?

There may be more than one preparation spec for F Production 914s these days, I'm not sure. Greg Amy would be more familiar with recent additions to the rule set. The specs I prepared my car to have been mostly static for a long time. Stock stroke (66mm), stock bore (93mm) + up to .047", stock length ferrous rods, stock dia valve heads, 40mm carbs, not sure about crankfire ignition. Dry sump is allowed on a "full prep" 914 FP engine.

[GregAmy]

There may be more than one preparation spec for F Production 914s these days, I'm not sure.

We're talkin' the 1.8, yes? The 1.8 (or a 1.7) engine is still in FP with the same basic specs as before, "Prep Level 1" or full-race spec. Porting/polishing, open cams, open compression, 1.2mm overbore, cylinders free, pair of 40mm Webers or Dells with 38mm chokes, dry sump. 1970# minimum weight.

Chris' 1.8L engine is already built to these specs. I borrowed it for the historics car for a couple weekends and it's very very good (I wish he'd sell it to me).

You can also run the 2L in FProd, but it's "Prep Level 2" or "limited prep". Port matching within 1" from intake manifold interface, 11:1 compression, .450" cams, twin carbs with 38mm chokes, 2-stage dry sump allowed. 2030# min weight.

If you're feeling flush, you can run a "full prep" 2L in E Production at 1820#, same prep as the 1.8L full prep. But that's a big engine class, so bring your wallet (BMW Z3 has won the last couple years, 944S before that?) For comparison, Kip van Steenburg has an EP 2L /6 he's been trying to get to the Runoffs but has had a world of trouble with it. But when he gets it runnin' it'll be runnin' good...

Or if you want to build a "limited prep" 1.8L, that's in H Prod at 2100#. Might be fun there (I should just remove the 2L badge and tell 'em it's a 1.8L lol)

EP: 2L /4 Full Prep 1820#; 2L /6 Full Prep 1900#
FP: 1.7/1.8L Full prep 1970#
FP: 2L Limited Prep 2030#
HP: 1.7/1.8L Limited Prep 2100#

Maybe someday Chris will sell me that 1.8L... - GA

Edit: I got 2-stage cam-driven dry-sump pumps allowed in all the Type 4 engines for the Porsche 914s, due to our shitty oiling system. So that's the standard CB Performance 2-stage pump or similar. I've asked a couple times to get the 2L limited prep engine allowed into HP but they're fraidy-skeered of it and want me to campaign it in FP so they can measure the performance...you know, the realm of Hondas and Miatas...nope.

[Charles Freeborn]

There may be more than one preparation spec for F Production 914s these days, I'm not sure.

We're talkin' the 1.8, yes? The 1.8 (or a 1.7) engine is still in FP with the same basic specs as before, "Prep Level 1" or full-race spec. Porting/polishing, open cams, open compression, 1.2mm overbore, cylinders free, pair of 40mm Webers or Dells with 38mm chokes, dry sump. 1970# minimum weight.

Chris' 1.8L engine is already built to these specs. I borrowed it for the historics car for a couple weekends and it's very very good (I wish he'd sell it to me).

You can also run the 2L in FProd, but it's "Prep Level 2" or "limited prep". Port matching within 1" from intake manifold interface, 11:1 compression, .450" cams, twin carbs with 38mm chokes, 2-stage dry sump allowed. 2030# min weight.

If you're feeling flush, you can run a "full prep" 2L in E Production at 1820#, same prep as the 1.8L full prep. But that's a big engine class, so bring your wallet (BMW Z3 has won the last couple years, 944S before that?) For comparison, Kip van Steenburg has an EP 2L /6 he's been trying to get to the Runoffs but has had a world of trouble with it. But when he gets it runnin' it'll be runnin' good...

Or if you want to build a "limited prep" 1.8L, that's in H Prod at 2100#. Might be fun there (I should just remove the 2L badge and tell 'em it's a 1.8L lol)

EP: 2L /4 Full Prep 1820#; 2L /6 Full Prep 1900#
FP: 1.7/1.8L Full prep 1970#
FP: 2L Limited Prep 2030#
HP: 1.7/1.8L Limited Prep 2100#

Maybe someday Chris will sell me that 1.8L... - GA

Edit: I got 2-stage cam-driven dry-sump pumps allowed in all the Type 4 engines for the Porsche 914s, due to our shitty oiling system. So that's the standard CB Performance 2-stage pump or similar. I've asked a couple times to get the 2L limited prep engine allowed into HP but they're fraidy-skeered of it and want me to campaign it in FP so they can measure the performance...you know, the realm of Hondas and Miatas...nope.

Yah, I avoid classes with Miatas too... those guys are nuts. Pro 3 is worse (3 series BMW's) - that's little more than a demolition derby. Unfortunately the SPU class is often shared with the Pro3 group as well as some other bigger cars so that's less of an appeal to me too.
As it sits now my car would fall into the higher level prep groups on account of bodywork, suspension, yes it's dry sump, crank fired ignition, etc. I fear a rather large rabbit hole looming if I go down that path. I have no intentions of national or for that matter, regional points or championship aspirations. Frankly at my age I'll probably only race it for a couple years and then take it out to the occasional track day. Vintage groups will be enough to scratch my itch, so I'll slot it in where I can and enjoy the ride. SVRA runs up here as well as a PNW based vintage body called SOVREN. Entry costs are a little higher, but it's relatively gentlemanly, which suits me fine.