SCCA EP class compliant. Rules state less than .5" lift, 85mm bore max, 75mm crank, stock valve diameter. This is a 12:1 m20b25 with a ForcedFirebird head, Schrick 288 cam. Dyno'd off-site on a Mustang Dyno. We use a Dynojet for normal operations. Logistics say, it's a long drive from New England to FL....
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Last edited by ForcedFirebird; 05-30-2018, 06:09 PM. -
That thing sounds awesome! Have you done much with M30 stuff? I wonder how 3.5L would respond to more compression, nice head work and a matching cam....... -
Just got a Euro Shark 635 that made a deposit today to do a high-strung NA build. It's 10.25:1 stock, we are upping the valve diameter, flowing the head, using a 290 cam and a Weber DOCE-3 manifold, DOCE-style ITB's. Throttle diameter TBD, but plan is to do something similar to this m20, just + displacement, and a lot more car to pull around.Comment
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Q) Whats it got for a bottom end?
A) 14:1... errr its stock hahah
This is just proof that M20s want more compression and the stroke is more for the torque side, right?Simon
Current Cars:
-1966 Lotus Elan
-1986 German Car
-2006 Volkswagen Jetta TDI
Make R3V Great Again -2020Comment
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That sounds right up my alley! Let me know how that car does- I'm sure it'll run great. Rama just finished up the M30 ITBs he's been working on BTW, I don't know if you saw that or not. Doesn't apply to the shark though if you're carbin' out with some triple 40s or something.Comment
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Actually, I was wrong. EP is 12:1 max, and he even had me CC the chanbers (all 6) to comply in the ruleset. The bottom end was built in Cali, sent back to New England and the bore was ~.001 too tight, they never even got to break-in. It was re-worked by a local to the customer, thrashed to finish and raced last weekend. This was the break in and initial base tuning. Once everything is settled, I have found they always make more the second go-round.
I was jumping up and down when I got the video and results. Kinda make my 2.8 ITB 217hp motor look like "child's play" when a single throttle (stock bore at that) made ~6whp less on a stingy Mustang Dyno.Comment
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Was asked not to share the dyno graph on this one :(
Am allowed to say it made 208whp/189wtq though :pLast edited by ForcedFirebird; 06-18-2018, 08:05 PM.Comment
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That thing looks pretty legit. Whats the weight without the driver?Simon
Current Cars:
-1966 Lotus Elan
-1986 German Car
-2006 Volkswagen Jetta TDI
Make R3V Great Again -2020Comment
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Would have to ask. It's based on what make of car you are running in EP.
According to this:E-Production (EP)
E-Production is the fastest of the production classes and features racing from classic and contemporary production based sports cars. Example cars include the Datsun 240z, Mazda Miata, Mazda RX-7, Honda S2000, Triumph TR6, Caterham 7 and the BMW Z4.
An e30 can be between 2200 and 2310 pending modifications (p.670)
For comparison sake, a hard running Spec e30 does ~160whp and has to weigh 2700lb post-race with driver - 18:1 HP:WT, this car is closer to 11:1. :)Comment
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89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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In car vid!
Yeah, that's Dave Markert, saw that one. Sending a PM...Comment
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Just a cool looking car. Post like this makes me want to have a second attempt at building a nice m20.
Instagram: Reichart12Comment
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