How much power do you gain when ported and polished?

Discussion in 'Engine' started by TheWalkingPlague, Jun 18, 2009.

  1. TheWalkingPlague

    TheWalkingPlague Member

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    like the title says how much HP,and torque do you gain with a mild port and how much do you gain for a wild port?
    How much faster do you go is the acceleration better?

    just wondering havnt seen a thread like this so giving it a shot and if i get more money i might get one.
  2. djack12

    djack12 New Member

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    Unless you have a Dyno, there is no way to tell how much power you have gained. It could be a lot it could be a little. A lot of people get work done, and say oh this thing is way faster now. Is it really? Or do you just think it is because you think the work should add tons of power.

    I had an aggressive trail port done, and I love it. It provides a lot more bottom end and the throttle response is better. I know that it makes more power, because my builder Dynos my motors for me. Angus Kennedy does a great job building motors. I can't wait to run the one he juts built me.

    As far as what is better I would recommend talking to all the builder to see who fits your needs best.
  3. burnin'_oil_2001

    burnin'_oil_2001 New Member

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    read my signature this is a package that Kennedy is goig to build for me. it is a quote from his email (minus pricing)
  4. PinkBlasty

    PinkBlasty New Member

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    First off, what kinda riding do you do? MX, wood/trail, drag? Theres many ways to be fast, port work is a great start, but setup is key. Most peeps think that by getting it ported it'll wake the beast up, not always true. Say you get port work but keep all the other stock sh*t on it, its pretty much useless. Gotta have the right combination of porting, carb, reeds, head mods, pipe, gearing, etc.....but thats just me!
  5. burnin'_oil_2001

    burnin'_oil_2001 New Member

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    Here is another quote that I got from a local builder Arlan @LED (he used to be with LRD).... here is some background

    Welcome to LED Performance!

    Arlan Lehman has over 30 years experience in building the most competitive ATV engines in the world. Working with the likes of Gary Denton, Barry Hawk, Bill Ballance, and Jeremiah Jones has allowed Arlan to understand what wins races and what makes ATV riding exciting. Whether you are in need of a basic service or a fully built race engine, LED Performance can help. Just give us a call and we will put a custom package together that works with your Riding Style, Performance Needs, and Budget.

    LED Performance


    anyways this is what he sent me...

    18 hp gain
    Blaster 240 kit Stage 3
    1 64510 Port 200-500 cc two stroke Single
    1 14-108-91-00 sleeve
    1 43597 install sleeve
    1 08295 Bore cylinder
    1 49405 Mill and reshape head (two stroke single)

    labor


    1 W876PS piston W876P all
    1 01201 wrist bearing
    1 B8ES plug
    1 GS5035 (C7332) Gasket set
    1 3PA-14613-10-00 ex gasket
    1 DT1604 brake in oil

    parts

    total

    Sub total

    Bolt On's
    1 Pipe/silencer
    1 016-163 carb 36 mm
    1 PD403 intake Manifold
    1 V-force reed valve
    1 49355 lighten fly wheel
    1 Air Box Adapter
    2 1/4" hose by 2 1/4" long, 2 1/4" tubing by 3 1/2" long, +3 hose clamps


    hope this helps
  6. blaster99

    blaster99 New Member

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    alottttttttttttttttt
  7. quam

    quam New Member

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    damn, burnin oil, but it seems to me that if you do ALL those mods, you oughta get more than 18 ponies. kennedy built a 50 hp 240. that's about 33 hp increase. seems to me that if you're gonna spend all that dough on all those parts/labor, you might wanna consider researching a few more builders.
    as for the initial question, yes port and polish is a HUGE benefit. it's like a performance cam in a 4stroke. changes the intake and exhaust behavior as well as the transfer timing and powerband length. talk to angus at kennedy_power, he knows what he's talking about and he dynos everything.
    pinkblasty's right, if you just do a p&p, you're just cutting the end of your dick off. you HAVE to have the head redesigned w/ the proper squish dimensions because the the stock head is a joke. also, p&p running on the the stock pipe won't run all that much better than stock. you NEED a proper pipe on a 2stroke to get any real power out of it. in fact, you need to know what kinda pipe you're gonna run and it's characteristics before you even talk to a builder about a p&p job, cuz that's one of the first things that any decent builder will ask you.
  8. Paulie B

    Paulie B New Member

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    Provided you get all the other stuff to compliment a port and polish, 60hp is even doable.
    Just remember that gettin big numbers from a small motor means high rpms and low torque.
  9. burnin'_oil_2001

    burnin'_oil_2001 New Member

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    Well, if you read my signature you will see that Kennedy is building my next engine and he is going to get me 34hp-- I assume that it is going to be crank horsepower. I told both builders what I use my Blaster for and my weight and Kennedy came back with the build in my sig. and LED gave me the info in the post. Honestly, I am less interested in peak hp but in spread and reliability. I would also like to be different and I have read about rod angles and a small change can make a significant difference in reliability in engines that see a lot of upper rpm use.
    here is a link to a Blaster with one for sale..
    YAMAHA BLASTER 240
    I also noticed in a search that randelator (from this site) has one. and here are a couple more links...
    video

    yamaha blaster 4mm stroker RD 400 long rod Video by MIKEY - MySpace Video@@AMEPARAM@@http://mediaservices.myspace.com/services/media/embed.aspx/m=24736750@@AMEPARAM@@mediaservices@@AMEPARAM@@myspace@@AMEPARAM@@services/media/embed@@AMEPARAM@@aspx/m@@AMEPARAM@@24736750

    4mm stroker with RD 400 long rod, Video by MIKEY - MySpace Video@@AMEPARAM@@http://mediaservices.myspace.com/services/media/embed.aspx/m=30043241@@AMEPARAM@@mediaservices@@AMEPARAM@@myspace@@AMEPARAM@@services/media/embed@@AMEPARAM@@aspx/m@@AMEPARAM@@30043241


    long-rod info

    1989 Blaster Engine Rebuild - Two-Stroke Software Review - Part 1


    I am hoping to here from one of the builders from the site as I am planning on this for my second Balster.
    Last edited by a moderator: Feb 6, 2014
  10. Blasterdude27

    Blasterdude27 New Member

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  11. jbblaster

    jbblaster New Member

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    dude that blaster was badass!!
  12. 03blasteryfs03

    03blasteryfs03 New Member

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    thats not bad ass thats insanley bad rite to the ass!!!!!!!!
  13. Paulie B

    Paulie B New Member

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    Blasters are quick when modded right no doubt about it!

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