Race Engine Challenge 2019

General engine tech -- Drag Racing to Circle Track

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Gregory
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Re: Race Engine Challenge 2019

Post by Gregory » Mon Apr 15, 2019 7:28 pm

Orr89rocz wrote:
Mon Apr 15, 2019 4:12 pm
Interesting competition but can i ask why a 12:1 comp limit and .775 zero lash lift limit? Idle under 1100..

Hardly seems race to me. Hot street maybe lol
The goal is a max street/strip engine. Most competitors aimed for 11.8/11.9 compression ratio. Given that all competitors
ran aluminum heads and a cam with a IVC to be competitive, the dynamic compression ratio brings things close to
pump gas - a little VP octane booster could get you there.
Same thing with the lift rule: take what would be an acceptable lift for a max street engine and stretch it a little - .775
minus lash and a little deflection and you’re in the .750 range.
Unlike our dyno racing competitor, we listen to the comments from engine builders - so keep them coming.
www.RaceEngineChallenge.com

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Re: Race Engine Challenge 2019

Post by Orr89rocz » Mon Apr 15, 2019 8:18 pm

I get it and i do like it. Just seems most race only guys are in the 13-15:1 range around me and elsewhere. And lift is .800+ for the bigger inch stuff. Like a 502-509” bbc, you can likely benefit from the higher lift more so than a 370-383 sbc, both within range of your cube rules. Not that it matters tho unless more compression changes induction dynamics in any way. I’m not sure.

I wanted to do a 12-13:1 e85 motor

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Re: Race Engine Challenge 2019

Post by CamKing » Tue Apr 16, 2019 11:35 am

Orr89rocz wrote:
Mon Apr 15, 2019 8:18 pm
I get it and i do like it. Just seems most race only guys are in the 13-15:1 range around me and elsewhere. And lift is .800+ for the bigger inch stuff. Like a 502-509” bbc, you can likely benefit from the higher lift more so than a 370-383 sbc, both within range of your cube rules. Not that it matters tho unless more compression changes induction dynamics in any way. I’m not sure.

I wanted to do a 12-13:1 e85 motor
The idea for this first class, was to have engines that would represent the cutting edge of street/strip engine technology. Something that a customer could go to an engine builder and have built to run limited miles on the street, and race at the track.

Hopefully, if this event takes off, they can add a class that represents "Race Only" engines.
Mike Jones
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Denver, NC
jonescams@bellsouth.net
http://www.jonescams.com
(704)489-2449

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Re: Race Engine Challenge 2019

Post by CamKing » Tue Apr 16, 2019 11:38 am

CamKing wrote:
Tue Apr 16, 2019 11:35 am
Orr89rocz wrote:
Mon Apr 15, 2019 8:18 pm
I get it and i do like it. Just seems most race only guys are in the 13-15:1 range around me and elsewhere. And lift is .800+ for the bigger inch stuff. Like a 502-509” bbc, you can likely benefit from the higher lift more so than a 370-383 sbc, both within range of your cube rules. Not that it matters tho unless more compression changes induction dynamics in any way. I’m not sure.

I wanted to do a 12-13:1 e85 motor
The idea for this first class, was to have engines that would represent the cutting edge of street/strip engine technology. Something that a customer could go to an engine builder and have built to run limited miles on the street, and race at the track. The .775" lift rule, represents the limitations an engine builder would run into for reliability on an engine that has to run a good number of miles on the street.

Hopefully, if this event takes off, they can add a class that represents "Race Only" engines.
Mike Jones
Jones Cam Designs
Denver, NC
jonescams@bellsouth.net
http://www.jonescams.com
(704)489-2449

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Re: Race Engine Challenge 2019

Post by F-BIRD'88 » Tue Apr 16, 2019 1:47 pm

Maybe also a "Unlimited Street" class that does allow water injection and or water Methanol Injection.
To ward off detonation on "street gas" . let it all hand out.
Now that I see that multi carbs are allowed I guess I
should pay some attention.

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Re: Race Engine Challenge 2019

Post by RevTheory » Tue Apr 16, 2019 3:22 pm

I was able to go through this years rules and I'm surprised at the leeway given to cam journal diameter, lifter diameter and valve angles. That should make for a gnarly competition.

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Re: Race Engine Challenge 2019

Post by CamKing » Tue Apr 16, 2019 3:37 pm

RevTheory wrote:
Tue Apr 16, 2019 3:22 pm
I was able to go through this years rules and I'm surprised at the leeway given to cam journal diameter, lifter diameter and valve angles. That should make for a gnarly competition.
Well, there's plenty of Street/strip engines running oversized cam journals, .904" lifters ,and all kinds of different valve angles, so why would they be restricted for a class that supposed to represent top of the line street/strip engines.
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Re: Race Engine Challenge 2019

Post by RevTheory » Tue Apr 16, 2019 3:57 pm

CamKing wrote:
Tue Apr 16, 2019 3:37 pm
RevTheory wrote:
Tue Apr 16, 2019 3:22 pm
I was able to go through this years rules and I'm surprised at the leeway given to cam journal diameter, lifter diameter and valve angles. That should make for a gnarly competition.
Well, there's plenty of Street/strip engines running oversized cam journals, .904" lifters ,and all kinds of different valve angles, so why would they be restricted for a class that supposed to represent top of the line street/strip engines.
I'm not being argumentative; just surprised. Maybe I'm just used to the restrictions placed on various classes at EMC.

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Re: Race Engine Challenge 2019

Post by Walter R. Malik » Tue Apr 16, 2019 5:41 pm

RevTheory wrote:
Tue Apr 16, 2019 3:57 pm
CamKing wrote:
Tue Apr 16, 2019 3:37 pm
RevTheory wrote:
Tue Apr 16, 2019 3:22 pm
I was able to go through this years rules and I'm surprised at the leeway given to cam journal diameter, lifter diameter and valve angles. That should make for a gnarly competition.
Well, there's plenty of Street/strip engines running oversized cam journals, .904" lifters ,and all kinds of different valve angles, so why would they be restricted for a class that supposed to represent top of the line street/strip engines.
I'm not being argumentative; just surprised. Maybe I'm just used to the restrictions placed on various classes at EMC.
I think both those lifter diameter maximums and cam journal size were to make every entry able to have a level playing field with nobody having a distinct advantage there, no matter what brand engine they entered. I believe the intake manifold rules were instituted with the same reasoning.

Some engine builder creativity was encouraged there, opening things for some fabrication instead of just normal store bought parts.
http://www.rmcompetition.com
Specialty engine building at its finest.

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Re: Race Engine Challenge 2019

Post by RevTheory » Tue Apr 16, 2019 5:50 pm

Yeah, I like it. Except that my distinct advantage just went away :lol:

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Re: Race Engine Challenge 2019

Post by Gregory » Tue Apr 16, 2019 9:07 pm

Orr89rocz wrote:
Mon Apr 15, 2019 8:18 pm
I get it and i do like it. Just seems most race only guys are in the 13-15:1 range around me and elsewhere. And lift is .800+ for the bigger inch stuff. Like a 502-509” bbc, you can likely benefit from the higher lift more so than a 370-383 sbc, both within range of your cube rules. Not that it matters tho unless more compression changes induction dynamics in any way. I’m not sure.

I wanted to do a 12-13:1 e85 motor
When it comes to the lift rule, you need to keep in mind that in a per cubic inch contest, history has shown that
engines in the 400 +- cu in range have an advantage. In our contest last year and EMC years ago, engines in this range had an edge. All the entries this year in REC are no larger than 440 cu in even though REC rules have an upper limit of 510 cu in.

All 2019 competitors have been notified and the line-up will be posted on ST and FB soon, as will the list of tech speakers.

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Re: Race Engine Challenge 2019

Post by Orr89rocz » Wed Apr 17, 2019 7:07 am

Gregory wrote:
Tue Apr 16, 2019 9:07 pm
Orr89rocz wrote:
Mon Apr 15, 2019 8:18 pm
I get it and i do like it. Just seems most race only guys are in the 13-15:1 range around me and elsewhere. And lift is .800+ for the bigger inch stuff. Like a 502-509” bbc, you can likely benefit from the higher lift more so than a 370-383 sbc, both within range of your cube rules. Not that it matters tho unless more compression changes induction dynamics in any way. I’m not sure.

I wanted to do a 12-13:1 e85 motor
When it comes to the lift rule, you need to keep in mind that in a per cubic inch contest, history has shown that
engines in the 400 +- cu in range have an advantage. In our contest last year and EMC years ago, engines in this range had an edge. All the entries this year in REC are no larger than 440 cu in even though REC rules have an upper limit of 510 cu in.

All 2019 competitors have been notified and the line-up will be posted on ST and FB soon, as will the list of tech speakers.
Yeah makes sense given the rules.

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