your losing HP, runtime, tune consistency, and if you ever go in too far on your needles you will have detonation with that hot of a plug. please Chris get some OS p4's or colder.

chim after reading what i said it kinda didnt explain what i meant. os and odonnel plugs have dif. threading. switching back to os and then trying to go back to odonnell could cause problems with air leaks forming at plug. im not saying that theres anything wrong with odonnell plugs they run good but just switching back and forth could be bad.

hey joe i ran the full modded on my truggy last nite....i ran almost half a gallon on it and it is really getting faster the more fuel i put through it....all i have are dynamite 086's pipes with the stock header so ill try and get the short one from someone today at the track...ill let ya know how the mains go thanks....bryce

Bryce, the stock dynamite header is fine... thats what i run.

well we ran this weekend at HCRC in indiana and had Bryan Seitz Qual. 3rd in the Buggy A and finished 3rd. Bryce Carter, Mark Flora, and myself all qual. in the Truggy A Bryce had the Tq, and win Flora was qual. 3rd and I was 5th. the js engines seem to run great with all of us running different pipes. so with that we will see how next week goes with the cash race at HCRC. thanks again to lucky 7 and E.B. Mods

I run the P4 plugs in mine.

well first race with js motor and all i can say is wow!! i ran half gal thru it friday night and motor just really feels great.....came in saturday fired it up and leaned top end out 1hr and never touched it all day.....motor idled and really was very smooth from bottom to top.....im running the dynamite 086 pipe and im really happy so far.....29 truggies today and myself, flora, j-dub all were qual TQ 3rd and 5th......thnx for all the input from fellow js guys

FYI I have been running OD plugs also and love them. I think the performance gains from a p4 are minimal.(splitting hairs) That's just my opinion.
Also if I am understanding this , The engine is not pipe sensitive but is plug sensitive ??? Anyway I love this engine it rocks.

the efficiency gains are far from minimal buddy. bottom line is EBMods recommends a OS P4 as the hottest plug you should run in this engine and anyone running a P3 or hotter should remove and re-tune with a OS P4.

why buy an engine and not run what the designer/manufacture suggests for optimum performance.

dumb question. I got a Race Prep, going to run a P4 with a Dyn 086. what carb insert is recommended. ALSO the bottom of my RacePrep has "23" etched into it (just wondering what that means lol) thanks

I run the 7mm. the numbers are just to help us ID them. thanks!

Well I finally ran the EB Mods Race Prepped JS racing engine on an outdoor type of track indoors. Been running on a small indoor track here in Iowa all winter. Was nice to run on a BIG track. I run them in both buggy"MBX6" and truggy "MBX6T". All I can say is wow! Power is killer and the run time is easily 10+ minutes. With the 7 mm res as well. I have been running the motor for a while but this is the true test for them.
The ONLY pipe and plug you should run is the 086 dynamite and the p4. I run the EB mods fuel as well and it IS better then Byrons. Better run times and the motors run cooler and crisper.
EB MODS TEAM DRIVER,
David Bradford

hey allaboutwho02 im in the same boat as u....the motors are awesome too...hey we've got our out with a bang cash and trophy race this sat and a couple of guys from iowa are coming again u should come we've got one of the biggest indoor tracks in the nation check it out hcrcracing.com
take care...bryce

I was thinking of going to hcrc..but 5 hr drive I race with Dave and really can not wait to get outdoors with this engine....I am not getting the bottom end punch I am wanting out of it on the indoor track, hopefully once outside it will be good to go..whats eveyones needle settings?

ya i know 5hrs is tough but we got guys coming from 8 states and its the last race and the new layout is really sweet!! we have practice from 4pm-10pm on friday and track opens up at 8am racing at noon....j-dub just told me that joe and ed are thinkin of making the trip out to race with us so it would be a great time.....hope to see you guys there....bryce oh the needle settings well i leaned the bottom about 5hrs and top about 6hrs from the breakin that ed had done so thats the best i can give ya...lol