What is the best way / place to install the "one engine stay" allowed per SCCA IT rules in both a 1st gen and 2nd gen CRX Si?

Is there much to be gained?

thanks!

WTB: 13x7 5 spoke revolutions or similar quality wheels

 

i guess youve got two options, either prevent sideways load or forward rotation of the engine. nick theroux found out when he built his ITA integra LS that the engine was so heavy that it was moving so far outward during turns that it would break his transmission in the diff because it loaded the outboard axle too much. so he installed a lateral engine stay by welding two posts on the driver side engine mount, the other one on the chassis side connected by the heim joint.

the other way to making an engine stay is to prevent engine torqueing when putting on the gas. ive seen some method in japan that mounts an actual shock absorber between the head and back firewall. although, not sure if that is within the definition of an "engine stay rod" and even the most secure of anchors. but ive been thinking of making a steel bracket that would use 2 tranny bolts as anchors and the other anchor to the front crossmember. basically this would limit the amount of travel the front engine mount can go up and down. im envisioning this in a 2g crx, not so familiar with a 1g.

hope this helps.

 

Thanks Tyson... Rick and I were talking about that last week. I envisioned Nick using a stay rod to eliminate engine "roll", not side-to-side movement.

Greg

 

So the "engine stay rod" is actually refering to a brace for the engine as opposed to a "strut tower bar?"

 

Correct.

 

check on crxmotorsports.com under engineering (torque supression device). Realspeed helped design this and it really works. We can build you one if interested

Jason

 

FWD cars that have three engine/transmission mounts (usually one per end and a front or a back) are the ones that need a stayrod more than do the Honda cars that have four (both ends, front and back) although some Hondas might have only three. My old Omni GLH Turbo would rock big time and they regularly broke the front mounts because there was no rear mount. I have never seen a Honda IT car use a stay rod but that is not to say that it wouldn't be of some benefit. A lateral stayrod could help reduce some side to side motion of the driveline but I wouldn't think the car would generate enough side load to do this if the mounts on both ends were in good shape.

Back when I worked at a tire store, we used to sell the heck out of a little shocks that the big '80s GM FWD cars used that was an engine torque damper and mounted right up front on top from the engine to the radiator core support. The engines weren't well mounted and they would break thiose dampers and the engines would literally flop around.

 

My mom's Lexus has one of those little dampers in the engine bay - its mounted vertically, from a bracket on the block to the front crossmember. Maybe something like that would work?

 

i wouldn't endorse doing it this way, but here's some inspiration if nothing else:



this is not on a race car afaik.

edit: this is better:

 

fwiw i think anchoring to the block is better than the head because you dont want to add any more stress to the head and gasket. as for the top anchor, looks like theyre trying to make a MC brace out of it as well. but i really dont like how its cantilevered, unless these another support that i cant see from the picture angle. i like the bottom one tho.

 

thanks for the ideas. now i'll see if i can install a single stay that will help in two directions!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tom91ita &raquo;</TD></TR><TR><TD CLASS="quote">thanks for the ideas. now i'll see if i can install a single stay that will help in two directions!</TD></TR></TABLE>

Do the rules say anything about a "Diagonal" stay?

 

Well, just browsing through, not sure if this is any help or know if it's legal; but on some older logitudital placed Ford and Chevy engines, they used a steel wire or chain to suppress violent engine and tranny movements. Well, Honda's are apparantly tranverse, but I'm wondering if something similar can be done for those on a budget. It may not be pretty, but could be something beneficial for cheap. Well, just a thought.