P5xlt or 21-4
 

Hi
First of all sorry for my poor english.
I need a new engine for my truggy.
I am considering 21-4 or P5XLT, but I can not really find out what would be the best. I prefer stable idle, good run times and reliability. Last season I ran with Sirio CL7B it lives up to the first two things but not the last.
I hope you can help me.

I don't own either, but I've tuned both for friends. The P5 would be my choice for truggy.

Both engines tune and run very well. The P5 has a nicer port timing profile on the sleeve but smaller exhaust surface area so it tends to make more torque but the Plus 4 will out perform the P5 on top. The Plus 4 has better crank timing profiles than the P5 which will also make it perform better up top. Both engines work well in a truggy with the proper setup. However, a nicely modified P5 will put perform the Plus 4 in every department including run time and will last as long or longer than the Plus 4. My race ported P5 costs about the same money as a stock Plus 4 and will have more power all around, will be very easy to tune, will get 10-12 minutes of runtime in a truggy and will last 12 gallons if treated properly. My race ported Plus 4 runs side by side with the P5. I have both engines in stock in either stock or modified trim so if you are interested, shoot me a pm.

i'm in the market for a P5XLT. i have couple of pipes. dyn mr053, dny086,jp1,jp2 and jp4. dont want to go buy a pipe, which one would is best for want i have.

based on my personal experience..
053 for small to medium,086 for larger open stretched tracks.
the jp2 is also a all purpose bad ass pipe on the p5 but run times may suffer a bit,if your not worried about fuel economy try the jp2.

If you are leaving it stock, I would agree with helivaguy and go with the 053 or 086. The JP4 also isn't too bad but definately not as strong as the JP1 or 2. If you want to get it race ported, I ran one the last 2 years with a JP1 and had more power than I needed and got between 9:30 and 10:30 consistantly so the rumors of the JP1 not being fairly fuel efficient are not totally true when talking about full race porting. It is definately not the best pipe out there for milage but it isn't that bad either. The P5's I have done with the same race porting as mine but ran pipes like the 9901SS/41021 or 9853SS were getting 11+ minutes so again there is even more room for improvement but fo r someone who has pipes already, there are certainly alternatives available to get the performance with run times with the equipment you already have. You can get a full blown P5 with a front ceramic for around the same money as a stock plus 4. Let me know if you are interested in something like that ;)

looking for stock. $250 is my budget. club racing only, P5XLT looks to be a good novarossi engine.$230 shipped from Amain very good deal
thanks for the replies

Hello!

I'm looking to buy an Plus4 Limited, and i was wondering which pipe would give more performance/fuel economy, the 9901/41021 or the 9853 with the same manifold.

Thanks

the 9901 combo

Mark I like what you had to say about the P5, what pipe and header combo would you reccomend for use in a losi truggy-mainly looking for a smooth powerband and good runtime

Thanks,
Jason

Jason- It depends what you consider smooth is. The last engine you bought from me was a GRP .21 with a non tuned case, GRP .28 crank with the turbo cuts and a GRP .21 onroad piston and sleeve. That thing was fast:lol: If you are looking to get another one from me, I would definately go with the P5 with full race port and 9901SS and 41021 header for smoother delivery. If you are looking for a little more low end punch, the 9853SS with the same header is a good choice and if you are looking for all low end and midrange, the 41020 header on either pipe will be way to go.

i have a plus 21-5k in my ofna mbx4 and it flies!!! i love the nova engines, only downfault to this particualr and some others is having to use a bump start for it, no pull string or rotostart parts for this engine!!! i would LOVE to have a roto start or even electric start lol.

novarossi = top of the line :nod::tire:


get your car/s ready for the summer season early ;)

Specials on plus4 and plus4C to be had , I can tell you that right now is the right time to get a plus4 guys ;) guaranteed

Www.houstonsengineservice.com
I am gonna change prices tonight :)

What are people runing for tuned pipes on the P5XS? I run the Dynamite 086 with good results but I want to try something else if I can get better performance out of it.

Anyone know a place that has 9901 pipes in stock? cant find them anywhere.

Thanks

367's are on sale for $225.00 how does it compare to the +4?

Get with Mark @ Powerhouse. I know he has them in stock.

i have a buddy mblgr...he hit me up to see if i wanted to pick up a near new 9901 ..i posted him the link ..you could prolly get in it right ..he said i would have to look really hard to tell it had been used ..maybe he will post it up here :nod:

Any one?

I have them available in black or grey hardcoat. I don't have any polished as they are on backorder. Let me know if you want one. Thanks

I always thought the 367 was a great engine. A lot of guys complained that they were flame out kings but the few guys I modded them for locally never had any trouble. We had similar success with the Plus21-5 as people complained of that one as well. For $225, it is definately worth a look. Where are they on sale for that price?

Yep Mark has them. :nod: :nod: :nod:

they do flame out
 

It's a fast engine, but mine was tough to tune....jmo...

I noticed my p5 had two allu. shims and one thin brass shim, is it ok to take out the thin brass one. What shims do yall use in a p5...

I have always pulled the .1 shim out of P5 head. Just be aware that if you run hotter plugs, you run a higher risk of preignition. Run a medium or cold plug if you want to be safe. If you elect to run a hot plug, your tune better be spot on. You can always run lower nitro %'s if you want but I assume you want to stick with your current fuel.

a little help guys...
Well after 9 tanks on parking lot as i said before a week. 21/1/10 At sunday i race at the first Truggy Master for 2010 here in Greece... With my new engine of course,the Plus 4... I race it with the same ''set up'' as i broke in... Byron 25% with 11% oil, Novarossi C6TGC glow plug,stock shimming , dynamite 053 pipe and 41021 novarossi header and 6.5 venturi...Tha race day was at 5 Celcious , i tune also my plus4 and never NEVER flameout ...My idle gap is so little,tiny idle gap.. My LSN is a little in from flush and my HSN is not tune at the race set up.... at the Qualify i get from the engine 80-86 Celcius and at the race 92 C... when i broke in my engine i get 95-105 with wrap head.... Also i never get over 8 minutes... my pitman said that when i go for refuelling i had some drops of fuel in the tank and i went for refuelling after 7.30 minutes..
Why so little run time?
I have so little run time because the engine have run only aprox. 1800ml-2000ml of fuel? rich set up?
Very good engine no flameouts if you tune it properly ver stable ,very powerfull even for a truggy but i want more run times

also i found my piston and the bottom of the button black-gold-brown but more to black ....This mean rich set up?

Get a 9901pipe:nod:I hve had the same problem with my toro nero, and you will smooth out the power band with the 9901/41029.And you can use odonnell97t glow plug then you will be doing 9-9.5min runs.Absolutly love this combo:tire:

I lost the grub screw on my 9901 SS. Does anyone know what size the screw is or have a link to a seller.
Thanks roy

Anybody try the 3005, or 3004 yet?

I was just reading that post and that was my first thought;) I was like either he has that thing too rich or that pipe and header are not responding as well as it could to that engine. There could be other reasons but unless I am seeing things for myself, it is always difficult to diagnose things over the net. If it was me, I would try another tuned section (9901SS or 9886) with the same header and see what you get.

My engine is still new it has burn aprox 2L of fuel...I have read that need over a gallon to see better run times... But i get the same run times as my dynamite 28 with 7.5 venturi and the nova is 21 with 6.5 venturi... But it is still rich in the HSN and it has medium plug in a very cold weather... For cold weather C5TGC or C5TGF?

I would switch to an odonnel plug 99T. Nova engines are excellent, Nova plugs however are not.

This is the reason that i have small run times?i must change and the button head if i put OD plug?

The 3000 series pipes are made to be quiet for european efra rules. They sacrifice power for quieter operation.

Does anyone know this?

Dubro/Greatplanes/etc. etc. all carry setscrew packs.

Also, for anyone looking/needing a 9901 SuperStrong...

I just listed a pair here.

Pipes only.

1-virtually new

1-lightly used.

http://www.rctech.net/forum/r-c-item...ml#post6922957

9901ss is also an approved efra legal tuned silencer rather than a tuned performance pipe ;)

4mm :)

i can concur..the 3000 series of the 9901 does not run as well as the regular one..i did not know that at the time though.:eek: