martin Posted October 7, 2007 Share Posted October 7, 2007 Well i've been attacking my tt pro .28 crank with the dremel for 2 days making a turbo scope and widening the inlet timing by about 2 degrees, also rounding the edges of the counter weight for better flow, did all that and then had to get my metal polish out and buff it all up+ the inside where the fuel flows through(the metals really dull and has loads of machining ridges in it as standard). Already ported and polished the liner a few weeks ago and performance increased a fair bit so al being well it should be an animal. Pretty pleased with how it went i am by all means not an expert at doing it but the engines i have done have all seen performance increases. I will be putting it to the test hopefully sometime this week New bearings are in the block all ready (sh .28 bearings fit the pro .28) the tt pro you can't buy the bearings seperate you have to buy the whole block (money making scam me thinks). let me know what you think guys (it will probably blow up but who cares its fun porting an engine) I will let you know what if its turned out to be, a tortoise or a hare. marty Quote Link to comment Share on other sites More sharing options...
wiggles Posted October 7, 2007 Share Posted October 7, 2007 looks, good i migth need a new front bearing for my ttpro .28 (i have found the mesurements so theres is plenty to chose from) Quote Link to comment Share on other sites More sharing options...
rc 4 life Posted October 7, 2007 Share Posted October 7, 2007 what about a gazelle? looks nice man. Quote Link to comment Share on other sites More sharing options...
Ziggy122 Posted October 7, 2007 Share Posted October 7, 2007 Oh dear I dread to see what u'll start next with a dremel Get some piks of the ported p+l But yeah just becareful - with porting u cant stay at WOT as long.... cause ur revs will be through the roof Dont forget to add a cold plug I'll keep an eye out for a flying martin car Ziggy Quote Link to comment Share on other sites More sharing options...
martin Posted October 7, 2007 Author Share Posted October 7, 2007 Oh dear I dread to see what u'll start next with a dremel Get some piks of the ported p+l But yeah just becareful - with porting u cant stay at WOT as long.... cause ur revs will be through the roof Dont forget to add a cold plug I'll keep an eye out for a flying martin car Ziggy i will put some pics up before and after porting of the liner and crankshaft later in the week the piston no need to touch it already has a cut out for more fuel inlet, the conrod already has a slight knife edge and i ain't trimming that down a think the rod will need all the strength it can get. I have loads of heat range plugs so i should be ok. Wot throttle your right ziggy about that mate but i only ever do short sharp burst of speed anyway so it will only rev flat out for a second or so. God knows what it will be like it already wheelies on command now Next thing to dremel hmm not sure im running out of things to do on the engine. marty Quote Link to comment Share on other sites More sharing options...
wiggles Posted October 7, 2007 Share Posted October 7, 2007 (edited) you could polish the head up so its nice and shiny on top Edited October 7, 2007 by wiggles Quote Link to comment Share on other sites More sharing options...
fivecheebs Posted October 8, 2007 Share Posted October 8, 2007 I cant really see the crank, but the paving slabs are nicely in focus ;-) :-p j/k This is quite interesting. Did you follow a guide or something? Do you have some links you could post about engine mods? Quote Link to comment Share on other sites More sharing options...
smithy1135 Posted October 8, 2007 Share Posted October 8, 2007 Wanna do my STS? Good job dude Dont forget to tell us how she goes now Quote Link to comment Share on other sites More sharing options...
Sin Posted October 8, 2007 Share Posted October 8, 2007 looks good, should go like 5h1t off a shovel (if it works) Quote Link to comment Share on other sites More sharing options...
martin Posted October 8, 2007 Author Share Posted October 8, 2007 Rebuilt it today after work and it didn't want to go it kept flooding so i thought because of the better fuel flow and intake it might be to rich on the lsn, Had to turn the lsn in by 1/4 turn and it struck up no problem so tomorrow i might get chance after work to tune it and see how it performs. The pics where by my phone so it ain't focused on the crank very well, never mined you get the general idea of what i've done. for a guide on how to port engines i just basically looked at how turbo scoops are carved into the crank and roughly take off 1/2mm each side of the crank inlet (roughly 2 degrees).Then get all the dremel polishing bits to polish it up to a nice shine. The boost port i have left alone because it has a nice tapper on it already.The 2 inlets all i have done is made a chammfered edge pointing towards the boost port to aid scavanging and directing the fuel mixture away from the exhaust port.Also polished those ports aswell. Exaust port i have left alone it is none restrictive (no liner showing through the exhaust port of the engine block. If you tap in porting a nitro engine on google you will find a few guides but all engines are different so need different types of porting techniques. I don't port other peoples engines just incase i might make them a paper weight i do my own for fun factor really im still learning and so far i've been good at it(fingers crossed). marty Quote Link to comment Share on other sites More sharing options...
martin Posted October 11, 2007 Author Share Posted October 11, 2007 Took the havoc for its first test run for 10 mins since modifying the whole engine (had other things to do). Put a new os 8 plug in and 25% tornado extra cooling blend, and wow the engine is a beast its got power that a never thought it could have, it instantly flips over and does a 360 and lands on its wheels again i was laughing my head off seeing it do that. Considering the havoc is single speed and does 50mph and still wheelies on command is pretty impressive. The engine will be running on the richer side off a tune now that its been modified, it was chucking loads of smoke out and was still awesome in performance, The havoc was still pulling wheelies with ease when coasting at 20+ mph then nailing the throttle. Im well chuffed that my hours of work has paid off cos one slight error on a port can be a none runner. I will post more pics soon). marty Quote Link to comment Share on other sites More sharing options...
alex199020 Posted October 11, 2007 Share Posted October 11, 2007 Sounds like a good job nice one. Get a vid up I think the havok should be next on the dremel list, shread some weight Quote Link to comment Share on other sites More sharing options...
martin Posted October 11, 2007 Author Share Posted October 11, 2007 When i get time i wll do a vid of the havoc, as for attacking the havoc with the dremel no thanks bud its already light enough i have problems with keeping it on all fours already. marty Quote Link to comment Share on other sites More sharing options...
St Andy Posted October 12, 2007 Share Posted October 12, 2007 That looks like a superb job and good to see it works well. How did you know which angle to cut the groove on? Quote Link to comment Share on other sites More sharing options...
richhrly Posted October 12, 2007 Share Posted October 12, 2007 well done man, just get some nice piccies up Quote Link to comment Share on other sites More sharing options...
martin Posted October 12, 2007 Author Share Posted October 12, 2007 Yeah i will get some better pics at the week end, the crank will be in the engine so i will just take the backplate off and take a pic from there, the liner i ported will only take 5 mins to take out so thats no problem, i will do before and after pics aswell, just haven't had time to upload them due to work. The angle of the groove mate i did it by the eye with a pencil then very carefully attacked it with the dremel. I basically went on the net and looked at various turbo crank scoops and what position they were. Some had 2 or 3 but i just did the 1 and mainly with 1 scoop they look/position like i have done mine. The liner was easy to do being brass but the crank (hardened steel) gave me a hard time it took ages and lots of different bits were needed to do the scoop. The polishing bored me on the crank aswell but i got good results just need to put it fully to the test at the weekend and give it some. marty Quote Link to comment Share on other sites More sharing options...
martin Posted October 12, 2007 Author Share Posted October 12, 2007 Decided to upload some photos of the work i've done this camera is a little bit better This is the crank before modifying there ain't rust just top discolouring from the nitro This is the modified crank now in my engine totally lathered in after run oil and burn't fuel. This is the sleeve before the modifying This is the sleeve now ported on both intake ports the boost port was ok as it is. Hope you like my work it took long enough to do. marty Quote Link to comment Share on other sites More sharing options...
smithy1135 Posted October 12, 2007 Share Posted October 12, 2007 I had the same problems :/ Its going super slow The work you have done looks really good though Quote Link to comment Share on other sites More sharing options...
martin Posted October 13, 2007 Author Share Posted October 13, 2007 Took it out for a 30 minute bash today, and holy cow its good, the grass was wet on the field so she was wheel spinning flicking water up by 6 feet from the back wheels, it gained traction at roughly 20mph wheelied flipped right over and lets just say my shell is well in half and my exhaust tail pipe rubbers have snapped off but that don't matter. New shell and a wheelie bar for xmas thats all she needs. I checked the temp and it was running at 230 after a good thrash about so thats ok. The fuel consumption has risen slightly but its going to a 130ml tank lasts me 10 mins i used to get 12 before but i am running it slightly richer now that its ported, i would not be happy if it blew up by leaning it out just to get a little more power/speed. She is nearly on 2 wheels all the time at high speed runs so the steering does nothing it just goes straight on near enough marty Quote Link to comment Share on other sites More sharing options...
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