Official Harrop TVS1740 Supercharger Thread

nycplumber wrote

I did the recalibration a few times already and no luck. Thanks a lot for the insight!!

rotomoto712 wrote

When I was going through this issue last year, Harrop mentioned that the learning procedure is not incorporated into the newer production kits. My ultimate fix ended up being replacing the actuator itself.

nycplumber wrote

So the entire unit that bolts on including the board and mechanism?

rotomoto712 wrote

No just the actuator that bolts to the plenum.

drwankel wrote

How smooth is everyone's idle here when your engine is massively heatsoaked and decently hot?

My idle is normally rock solid, but I've noticed that if I get things really hot and very heat soaked on a hot day, the idle will start bouncing a bit when at a stop. Its something I noticed last summer and as warmer weather is slowly ramping up, it something I have recently noticed again. This happens at any fuel level, but it usually occurs on a warm/hot day after I have been pushing the car hard, and then get stuck in really bad long unexpected traffic.

My initial thought is the Idle Air Control valve starting to let go. However, since the problem only seems to occur in very specific circumstances, it seems possible that this could be a quirk of the supercharger kit. If the idle air control valve was starting to go out, I would expect symptoms across other temperature ranges. It also seems plausible that the idle behavior could be caused by the idle air control valve starting to fail, and it will get worse over time and see effect in other temperature ranges.

In hindsight, I kind of wish I had refreshed the idle air control during the supercharger kit installation along with the starter, and some "lifetime" throttle actuators. All of those things will fail at some point. The fuel breather valve was changed during the supercharger install. Throttle actuators have already been replaced once, but they are OEM, and will die again at some point.

I will be adding a full Do88 kit at some point this year. Should massively help with the temps when its warm out.

DrFerry wrote

Could it be this one?
https://www.m3post.com/forums/showpost.php?p=28876427&postcount=1188

ImmortalBimmer wrote

We're you able to install it yet? I'm quite curious since I live in Houston too. I would head this route to if it works for you.

drwankel wrote

Does anybody remember what the fitment issue was with the do88 big pack and the harrop kit?

If I remember correctly, the dct cooler ducting had issues with the harrop intercooler piping. I'm not 100% sure that was it.

There was a post where someone called out this issue and showed what they did to work around it. I'm seemingly unable to locate that post. If anybody could find that post, or repost the information and pictures, or share what you personally did to work around this, I would be grateful.

Planning on getting the do88 kit before next summer and I want to ensure I have a plan for those fitment issues.

DrFerry wrote

Try sending him a P.M. and ask the question(s). His email may still be on file, and if so the system will alert him via email he has a P.M. He may not answer, but you never know. The Duke was very reliable in the past.

BPMSport wrote

Fear not…I know it’s been a long time coming but it’s around the corner - likely Jan/Feb. We were actually supposed to shoot some Stage I vs Stage II videos this weekend but a drunk 24 year old plowed into the Stage I car yesterday while it a was parked :/ I need to find another Stage I 6MT locally or wait for the car to get fixed.

All of the parts should be here in the next week and have been in manufacturing for awhile. USA made of course.

I also need to list the 4 kits available first as I have been very behind.

DrFerry wrote

Beat me to it and fixed it for yuh...
.