I like my 3.27 but I have never driven with anything else. I can tell you that it is quite a bit taller now that stock. I am going to drive it today to work and ill see where 5th gear is once the torque converter locks in. Ill measure the rpm and speed at two different points.
That will be interesting see. I’m leaning towards the 3.27. After reading all of this info, I feel like it may be the best match for the SC.
The lower the ratio the lower the RPM at cruising speed and the higher the top end speed. The higher the gear ratio was used to be at or close to red line at the end of the quarter mile (to be in the engines power band) Just trying to explain to the people that do not know the difference. I hope that everyone can understand this explanation.
Got it. I guess that brings up another question now. Forgive my ignorance. With the 3.27, Can we get more top end speed or is it governed by the ECM at a certain speed? Depend on the tune?
Hi Everyone. I was looking for some information regarding the rear differential options on the project 324 set up (plus one & DDM). I’ve seen a brief description on the websites selling them, but was curious as to what to expect. I’m interested in one of the LSD options. I’m supercharged at about 350HP. I don’t know what the better option is between the 3.27 LSD and the 3.45 LSD. Any information would be much appreciated.
Love the quad Kit! I’ve seen wokka quad set up and the bullet with the welter dual rears. I’d like to see how they look on this kit. I feel that the rear sub frame gives a lot of mounting options.
Can a WP dual rear exhaust be used with this kit?
Myself and a couple people in the area have had our angle drives blow out and replaced. The new Angle drive has little to no wine to it at all and a different part number. It was replaced last year. I’m the only boosted sling out of the ones I know of. According to the dealer, It happens often. I asked about the different part number. I was informed that there is no difference in the part other than a different number. Not sure why our new Angle drives are now silent.
Display MoreA few months ago I had to replace my O2 with a universal Bosch sensor. And it works perfectly.
The other day I was at Orileys and they had a sensor laying on the counter. I noticed the blue and black plug on the end of it. I knew it looked really familiar. So I carried it home and bingo.... I checked it against my original O2 sensor and it was a perfect match. It's a heated 4 wire O2 sensor. With the correct pinouts.
It is a Bosch 16746 and it fits a Cadillac SRX or CTS or STS 2005 and 2006.
And if you look on amazon I have found them for $31.40
Is this the same part # for the 2016’s? I’m assuming nothing has changed.
I think you have a pretty good plan going forward with enjoying the summer up there and then doing something over the winter. Also, it sounds like you have some great help up there and should be able to knock it out pretty easily when you do decide to the the engine and cams
Casey_SS has been a great help. Thanks to him I did not have to get YouTube certified. Lol!! 2 big lessons learned
#1 don’t drop the timing chain guide bolt in the oil pan. Results in pulling the pan twice. 🤦♂️
#2 make sure the Blow off valve cap is threaded or the spring will go flying into the woods.
Thanks Dave, I appreciate that info. Also want to say thanks for all the time spent on the phone while I ripped her apart and used the parts you sent to resurrect her for the summer. I recently asked rabtech what his thoughts where on a built motor at my power level. By the end of our conversation he had me seeing dollar signs and 450+ horsepower. Lol!!! Beast mode. When putting it back together I did use ARP head studs but am kinda kicking myself in the ass for not taking the opportunity to go forged. I drive pretty hard and shift at Red line 95% of the time. This winter I will Be making changes but need to decide which route I’m going.
I can confirm what has been said about the HP numbers. I have been running an unforged motor safely at 350 HP dynod at the wheel. My set up is the DDM Supercharger with Cams with an updated tune.
rabtech MACAWS and my self have beetin our engines pretty hard to validate the 350 HP number unforged.
As anyone who has been in my sling will tell you, I bounce the rev limiter regularly with some reckless abandon.
Thank Dave@DDMWorks for the great products.
Slingrazor , what exhaust are you running? I have heard that the welter duals (2.5”) are borderline small once over the 300hp range on a supercharged motor? I’ll be making a lot of changes this winter and would also like to confirm this. I’m happy to hear you are running strong on stock motor. I beat the hell (100mm pulley) out of mine as well but after having a piston failure I’m trying to figure out what I need to change.
IIRC, the conventional rule of thumb for the Ecotec 2.4 motor is a max of 75 HP/cylinder (300 HP) before needing forged rods. Most of the turbo kits sold for the Slingshot for use with stock motors safely fall under that limit. The closer you get to 300 or more HP, the more likely you are to encounter problems on a stock motor. IIRC, the Pontiac Solstice and Saturn Sky used forged pistons on their 2.4L motors for a couple years, making those years a good block for rebuilding/boosting, but later motor castings have some improvements to cooling cast into the blocks. Most of the engine builders for the Slingshot use or offer the improved blocks.
Does this apply to Superchargers as well? I’m pretty sure your not exceeding 350hp with a SC but was curious about heat build up and exhaust sizing as well. I’m currently running welter duals (2.5”).
What the hell are you up to now?
Good question! Do tell Rab!🤔
Thinking about rebuilding my motor. At what horse power should forged pistons and rods be considered? Also thinking about a swap out with DDM’s built motor option.
I love it. I installed it at Maggie this year and as soon as I shifted to 3rd I realized exactly how much more power it added as my rear tire spun out almost all the way to 4th. Lol!! I think Dave said it peaks at about 10psi.
I have to jump on the band wagon here! I just swapped my pulley to the 100 as well. I’ll be waiting my turn in line for that DDM motor build and a smaller pulley✌️
Awesome discounts on the sway bar and short shifter!!! Hoping the sway bar plays nice with my GT shocks!
Just finished up installing the DDM supercharger today on my 16.5. I have about 100 miles on it so far. Quick question for you supercharger guys. Is it normal that the cockpit temps significantly increase after the install? Did the removal of the rear radiator shroud effect this? Also, I know the ECU is still learning but I am getting a sort of fluttering sound from the exhaust at idle. Just trying to figure out what is normal and what is not? New to the world of boost. Also like to thank @Casey_SS for all his help with the Install. @TravAZ and @Ghost had me covered with all the pre install questions. I sincerely appreciate it guys. Thank you.
Thanks for the reply @Dave@DDMWorks left a message with Angie. Will need to speak with you regarding the tune, pulley size change, and a couple other misc items. Happy to hear your back in the country and had a safe trip.
It will be nice to hear your findings. Bob is a stand up guy and great at what he does. I just purchased the DDM supercharger so I'm sure my rev hang issues will be eliminated once I obtain the new SC tune. Either way keep us posted.
Cat was gone before Bob's tune was installed. I'm sure Bob will rectify the problem as soon as I can part with the ECM for a few days. I'm in Oregon now and dont want to down the sling until I get back home, too much riding to be done in the Pacific Northwest.
Maybe I can send it to him when I start my journey home and it will be there waiting on me when I get home.
LC
@LargeCar I am also running NA with Bobs Tune. exhaust (no cat), header, and intake. My friend and I sent our computers out together. Both came back with great results. Unfortunately we both almost immediately started to notice the rev hang that had never been there before, exactly as you have described. I spoke with Bob shortly after the tune and he assured me it was nothing to do with what he did. I have recently spoke with other individuals about this same problem but felt as though my friend and I where the only individuals this was happening to. I'm well aware that some stock Slings where plagued with this before a re-flash and have heard rumors about the SC slings. I have heard nothing but good things about Bobs tunes which made me think our issues where always there but only showed their ugly faces after.
