Is it safe to run 25 degree of timing in top speed?

[alqatan]

Hi guys actually as I said in my last post I wanna race JUN EVO for top speed run, the guy keep calling me day after day and I'm affraid to blew the engine.

I've run the car for 1/4 mile and till the end of 4th gear, the pocket logger showed 25 degree of timing and the EGT was rising up till 980c, what is the last level, my EGT is on the hottest cylindar I have two type of EGT greddy and apexi at the same cylindar and both shows the same, my wide band is still low like 11.8 or maybe less.

I keep changing plugs after every run, if I don't the car will be cutting like mis fire, I have bpr7es i used to gap the plug to .028 inch now I keep them on .030 because I have extreem motor sports ignition.

My Eclipse is highly moded, I have everything you imagine but no standalone ecu because I live in Bahrain we don't have good tuners and no dyno at all.

My fuel managment MAFT version 1.3+660 cc injectors+AEM fuel rail+AEM fuel regulator+S-AFC.

My turbo is fp3065 and I run 30 psi on stock 1g bottom end, I have stoker kit which I didn't install because I'm waiting to blew my stock engine first, if you wanna see my drag run please view my last post you will see my 11.88 run.

Please guys I need your help.
Thanks

 

[badgsx]

30psi on a Fp3065 with 660's and a safc???? WOW. I didnt think that was possible. What are your injector duty cycles at?

 

[Mirage2LTurbo]

Yeah, I second that "no good tuners in Bahrain" comment.

 

[alqatan]

Actually i have 1g short block and my compression is very low because I have mitsubishi gaskit which is thicker than the stock I guess my compression is 7.5:1.

I have AEM fuel rail+AEM fuel regulator+660 cc injecotrs, I've chose 660 cc injectors because I used to have T3/to4e 60 trim.

My air fuel ratio is still low like 11.5:1 at high rpms, you can view the post before that and you would see I got 11.88 sec with 30 psi, the boost gauge can be shown, I do have 720 cc injectors but as I said I'm worried about the timing, as much as I increase the injectors size the timing will go advance more and more because I'll have to lean it out, I guess there is only one way possilbe to do that, lower my base fuel pressure to 38 or 36 like the 1g stock and use 720cc, I can't view my duty cycle, how can I tell what is my duty cycle, I don't have DSM Link, I have pocket logger I don't know if I can view that, actually I don't know how to save the run on pocket loggger, this will be really easy to find out what is the problem.

My question is can I run a top speed run like 292 km/h and hit the rev limiter at 5th gear with 25 degree of timing, as I said my wide band is low I mean still in safe side but my EGT keep rising because of timing. can I ignor the EGT and put my eye on the wide band because with c16 and more advance timing I don't think it'll detenate.

Correct me please if I was wrong, I'm not here to argue with you guys if I can use 660 cc injectors, I don't want to prove anything I only wanna solve my problem

Thanks

 

[fastdsmz]

I assume your running a 1g head and cas. If so why dont you just retard the timing there a few degrees? Instead of stock 5btdc why not try 0 and see what you get on the logger. More timing advance means more cylinder pressure. I assume your on race gas and since you have the stroker anyway just go for it, if it blows that will give you a reason to put the stroker in. On race gas and 25 degrees I personally think your ok for 1/4 mile but top end you may be pushing it a little. Thats alot of pressure and load on the motor for a lot longer than 11 seconds. Also I wouldnt recomend doing several runs back to back thats just asking for something to blow. Good luck.

 

[alqatan]

I assume your running a 1g head and cas. If so why dont you just retard the timing there a few degrees? Instead of stock 5btdc why not try 0 and see what you get on the logger. More timing advance means more cylinder pressure. I assume your on race gas and since you have the stroker anyway just go for it, if it blows that will give you a reason to put the stroker in. On race gas and 25 degrees I personally think your ok for 1/4 mile but top end you may be pushing it a little. Thats alot of pressure and load on the motor for a lot longer than 11 seconds. Also I wouldnt recomend doing several runs back to back thats just asking for something to blow. Good luck.

I tried to lower the base timing at idle by 5 degree but the car felt very slow and I had to change all the tuning and still didn't feel fast.

I think I'll go to AEM or DSM link
Thanks

 

[diambo4life]

I would definitely lower the base timing closer to 0. 25* is alot of timing especially on a high speed run and with that much boost. If it was around 18-19, it would be better.

You definitely need better engine management. The car should be trapping at least 10mph more than what you are trapping right now. The tuning is waaay off.

You have no chance especially running a genuine JUN EVO. JUN had the second fastest car (a 22B Impreza WRX) when running the top speed comp. in NZ a few years ago. Their drag Silvia was trapping 150mph and running 9's like 5-6years ago on the stock unibody. The owner is a wizard. You have your hands full.

 

[alqatan]

I would definitely lower the base timing closer to 0. 25* is alot of timing especially on a high speed run and with that much boost. If it was around 18-19, it would be better.

You definitely need better engine management. The car should be trapping at least 10mph more than what you are trapping right now. The tuning is waaay off.

You have no chance especially running a genuine JUN EVO. JUN had the second fastest car (a 22B Impreza WRX) when running the top speed comp. in NZ a few years ago. Their drag Silvia was trapping 150mph and running 9's like 5-6years ago on the stock unibody. The owner is a wizard. You have your hands full.

I'm sure you never saw what can the FWD eclipse can do at top speed, have you ever seen a top speed Eclipse video from zero till 292 km/h I'm sure you didn't actually I have my top speed video but I can't post it here because it's very long lets say 40 MB, if someone can add me to his AIM at alqatan I would be so happy to show you the video.

The evo can't kill the Eclipse which battle highway I'm going to race him from rolling 80 km/h till I reach 292 km/h this was with my 18/225/40 tires, now I got a better tires which is 235/40/18 inch It's 25.4 inch bigger tires than my old one this will give me a top speed of 295 km/h at 7500 rpm, when I got my 292 km/h my tires where the old one but the rpm level was 7700 rpm, I can reach more rpm at the 5th gear I don't know why is that normal in the Eclipse because all the rev limiter is 7500 rpm except in the end of 5th gear, this is what S-AFC says and what can be shows in the odometer.

Last time my rpm level was 7700 and the AVC-R showed 292 km/h displayed but if my rpm level was 7700 I'll get more top speed in the 5th gear, check this web site
http://www.davewin.com/tech/gear_ratios.shtml

Please enter the gear ratio of FWD Eclipse+24.1 inch this will give you a 291 km/h on 7500 rpm and 299 km/h with 7700 rpm I guess with my new tires which is Michelin pilot sport PS2 which grip very very well check it out at tirerack.com it's 9.5 out of 10 for dry traction better than BFgoodrich drag radial i guess from rolling 80 km/h I won't have wheel spin but I'll get him at high speed because the FWD eclipse can kill the EVO at high speed we are racing for 2.4 km distance.

With my new tires if I reach 7500 rpm my speed will be 295 km/h and if my rev limiter rised to 7700 I'll be on 303 km/h.

Now I e-mailed slowboyracing asking them to send me DSM link but actually I'm totaly lost and don't know how to use it at all, hope you can help me.

Thanks guys