S&S IST Ignition

[turboprop]

Unless something has changed, the IST ignition is not compatable with the shovel head engines. S&S does make a conventional nose-cone style ignition system that is compatible with shovel and evo motors, but that is not what is being discussed here.

[ST40]

Unless something has changed, the IST ignition is not compatable with the shovel head engines. S&S does make a conventional nose-cone style ignition system that is compatible with shovel and evo motors, but that is not what is being discussed here.

You're right, turboprop.  It's the SST or Super Stock ignition that came with the Shovel engine.    Marty

[ANNIVERSARY DEUCE]

Hey Roll, sorry I just got your question, been without a computer for a few days. I'm running Wood's TW6HG cams, heads done by MegaFlow including matching intake manifold to ports, SE High Comp Forged Pistons and SE 95" cylinders. Cams are gear drive, Feuling cam plate, lifters, pushrods and S&S roller rockers. Wood's Rebel 415 carb and lower end done by Hoban. Runs real strong from idle to 6500, that's when I get out of the throttle cause it's a B motor. CCP is 200psi front and rear. Decided which ignition to use yet?

[Rollmeaway]

I guess having a statement like mikuni might not work sells more S&S carbs...but think of it this way. the knock sensor is listening for a frequency on a sound wave. A click of a carb slide or fingernails tapping on the engine are two different things. Like asking your wife to yell then asking your kid to yell. You can easily tell them apart. Next the mikuni rattle noise only happens at idle.. off idle the slide is sucked back solid. ....Anyway it works and works great...  BTW if you don't want to hear the sound at idle get an Ultima air cleaner made for a mikuni..even comes with jets recommended based on cubic inches and carb used...


Eh! Eddy

Thanks for your post man, I gotta tell ya I like the Mik but I also like the IST, to hear someone else has defy'd the odds is music to my ears. I am going to try the Mik which is already set up for the 95'' If the idle is the only issue NUF SAID cause if shes knockin at idle there are other issues than load.

Thanks Dare

Eh! Eddy

Thats good to know now ya mentioned it, When I was reading about the system in the S&S site there was mention of it wont work with the mikuni flatside. It then goes on to say if you want to use it with this carb to contact S&S & they will help ya through the process.

http://www.sscycle.com/uploads/instructions/51-1136_ignition_system_s&s_installation_instructions_for_all_1999-up_carbureted_harley-davidson_twin_cam_88_engines.pdf

I believe the units are the same. Just need the right install kit.

Eh! RKing are you talking you have the module only or the whole enchilada module & harness complete. If you have the complete setup shoot me the model # & ill check it out as to fit. Maybe we can do some business.

[Rollmeaway]

Hey Roll, sorry I just got your question, been without a computer for a few days. I'm running Wood's TW6HG cams, heads done by MegaFlow including matching intake manifold to ports, SE High Comp Forged Pistons and SE 95" cylinders. Cams are gear drive, Feuling cam plate, lifters, pushrods and S&S roller rockers. Wood's Rebel 415 carb and lower end done by Hoban. Runs real strong from idle to 6500, that's when I get out of the throttle cause it's a B motor. CCP is 200psi front and rear. Decided which ignition to use yet?

Eh! Duece all is cool nothing moves that fast here besides I just got time myself.

I am committed to the IST, have been in contact with a fello HTT'r & a very well known machine shop/racer who says nothing but good about the system.
From what I have read here & from what I have heard in the tech side of town it's second to none. Amazing what a frickin box of brains can do for ya but its evident from the posts here. What really made me howl is when they got talkin dwell outa an electrical box  dwell to me is done in a distributor machine while setting the vacuum advance Ole' school ya I guess maybe more than I care to admit.

Btw Duece nice setup ya got down under. Shes gotta make ya smile

[ANNIVERSARY DEUCE]

Good choice, don't believe you can go wrong with the IST. It'll also allow you more time to tinker with other stuff since you won't be chasing a particular advance curve and initial timing setting. Good luck and post after you install it.

[Rollmeaway]

Good choice, don't believe you can go wrong with the IST. It'll also allow you more time to tinker with other stuff since you won't be chasing a particular advance curve and initial timing setting. Good luck and post after you install it.

Eh! Duece when i get her on the road n runnin Ill let ya know

Ya know there comes a time when ya dont have much time to do 6 things that one can thing can do, temperature sensing, timing, knock sensing, dwell, bad situations, & a memory bank to prevent the same bad situation happening again. All that in one little black box.

Hmmmm I just wish I could get the same out of a woman, just come in clean my house on a Friday leave on a Sunday without getting to hot to dwell on my time & stop knockin about like a time bomb waiting for a good situation

[HotRock]

I'm running an IST on my 116" with a Mikuni 45 and have not had any problems.   Would I do the same again?  You Bet'cha!   My first choice.

[Rollmeaway]

Eh! HR

I have heard nothing but good about the IST Ignition. Your just another example of the fact that it is a top-notch system.

Thanks

[02FYRFTR]

Great ignition system for carbed motors.  Installed two in the last year one for a 48mm Mikuni on a 124" and another on a 107" with 45 mm Mikuni.   No issues a real engine saver, runnning with anti knock sensing on both bikes.  Only thing I don't like is the Guardian Software has never been updated for 64bit operating sysyems.  Spke to S&S and they had no intention on upgrading to 64 bit.  I keep an old laptop with 32 bit system just for the IST Guardian Software.

[rking1550]

Great ignition system for carbed motors.  Installed two in the last year one for a 48mm Mikuni on a 124" and another on a 107" with 45 mm Mikuni.   No issues a real engine saver, runnning with anti knock sensing on both bikes.  Only thing I don't like is the Guardian Software has never been updated for 64bit operating sysyems.  Spke to S&S and they had no intention on upgrading to 64 bit.  I keep an old laptop with 32 bit system just for the IST Guardian Software.

did you get to do a comparison dyno runs ?   just wondering how the HP and TQ numbers compared to a ignition like the DTT.   A save map doesn't always mean the best performing map.

[02FYRFTR]

No, really no reason to unless the street and highways become Dyno machines.  Dyno is one moment in time and will always be just that !!
  IST is an engine saver !!

[Rollmeaway]

Going to be using the IST with the MIK 42 see if it's fact or fiction about the mikuni carburetors.

I am sure there are lots out there that have the same setup IST & MIK

[Azgunner]

Rollmeaway, did you ever try the IST with your Mikuni? How's it working, any problems?

[RevFastEddy]

Sorry it took so long to get back but I have been moving from Seattle to Cali...


I have run 42mm and 45mm Mikunis with IST ignitions and have never has a problem.  The knock sensor supplied is  BOSCH MODEL used vw, bmw, mercedes and other autos.. preignition frequency is far different than any Mikuni sound but if someone else has had a problem I dont know.

Eh! Eddy

Thats good to know now ya mentioned it, When I was reading about the system in the S&S site there was mention of it wont work with the mikuni flatside. It then goes on to say if you want to use it with this carb to contact S&S & they will help ya through the process.

http://www.sscycle.com/uploads/instructions/51-1136_ignition_system_s&s_installation_instructions_for_all_1999-up_carbureted_harley-davidson_twin_cam_88_engines.pdf

I believe the units are the same. Just need the right install kit.

Eh! RKing are you talking you have the module only or the whole enchilada module & harness complete. If you have the complete setup shoot me the model # & ill check it out as to fit. Maybe we can do some business.

[Rollmeaway]

Rollmeaway, did you ever try the IST with your Mikuni? How's it working, any problems?

Hi Gunner....

I haven't put fire to it as of yet, been too preoccupied. Ya I know gotta get some time of my own.

Hi Eddy .... Could you tell me if there are any identification #s on the sensors, I am thinkin if I could get some #s I may be able to buy them locally.

TIA

[rbabos]

Rollmeaway, did you ever try the IST with your Mikuni? How's it working, any problems?

Hi Gunner....

I haven't put fire to it as of yet, been too preoccupied. Ya I know gotta get some time of my own.

Hi Eddy .... Could you tell me if there are any identification #s on the sensors, I am thinkin if I could get some #s I may be able to buy them locally.

TIA

I thought you'd be riding that sucker by now. 
Ron

[Rollmeaway]

Ya in a perfect world maybe. Need the horses to come in way of a lottery. Things have been slow as far as work goes & it has slowed down the progress. Patience is something you have to aquire to avoid insanity....

[Azgunner]

Hopefully work will pick up for ya. Please give us an update when you get it all together & running. 

[Rollmeaway]

Hopefully work will pick up for ya. Please give us an update when you get it all together & running. 

Eh Gunner

I'll certainly do that & when I get the frame back from the painter I'll post some pictures.