Popular Post Roman Posted January 16, 2022 Author Popular Post Share Posted January 16, 2022 28 minutes ago, kpr said: NOS goes against the whole NA tuning thing imo. may as well just jam a 150 shot on a stock echo - maybe someone should do this Yeah I agree with this, using NOS and you lose some the masochistic charm of NA tuning. 41 minutes ago, cletus said: IMO anything faster than 15 seconds needs a proper drag tyre otherwise you are wasting time with any performance mods if you can't use 100% of it to get down the track I've had a few sets of drag specific tyres even on mid-low 14 second cars and if nothing else it makes the car a lot more consistent which is very important if you want to get anywhere in DYO I've raced the VG on street tyres quite a few times, that doesn't have much power and its auto and even then it's a bit of an unknown if it's going to hook or spin Yeah, its just such an incredible difference I dont think I'd want to do it on street tyres again. With the semi slicks you can choose between wheel hop, bog, or spin up. Then it wont stop spinning unless you back right out of it. On these its like a magic carpet ride! Even if rpm is higher it just keeps on propelling you forward. So good! 1 hour ago, shrike said: @Romansounds like you need to get another Prius engine from the wreckers and build the bottom end with beefier rods and some other go fast mods (cleaning up casting marks etc etc) just don't add any speed holes Good point on the Nos dry shot, typically when I've seen/done Nos its always been when injectors are getting close to the limit on 4 cylinder turbo setups (2200cc injectors) in saying that these days dual injectors per cylinder is more common I forget this is N/A sometimes, effectively you've gotten double the factory horsepower which in most cases would be a bar of boost to achieve (general rule of thumb obviously) Didn't realize the cost of it in NZ was that nuts, its about $14 per 500g here (but can get cheaper options if buying in bulk etc) though the states is like $3.5usd a lb or $1.70usd a lb if you buy 60Lb at a time Though I guess if you work it out then at $14 a run its not that cheap as i'd expect you to use a lb per run and $140 per refill of a 10lb bottle isn't cheap Keen to see the exhaust gains tbh Id say what about pre intake C02 cooling but as your running ITB it wouldn't be that easy, dry ice on the intake manifold between runs? :p Still got sound deadening? On this car the sound deadening isnt actually stuck to the chassis, its just a thick slab of matting that goes between the carpet and the body. So you literally just lift it out. Then bam 20kg gone! I like some of your other ideas here but reality is I've only got a fairly shoestring budget for this project from here onwards. I'd like to get the carina going again this year. So for the moment I'm just gonna get an exhaust done when I can then worry about whatever else later. And just get some more runs done! And get to a trackday hopefully, which is where I was expecting this car would shine more than the drags. 15 1 Quote Link to comment Share on other sites More sharing options...
Ashkellybarr Posted January 16, 2022 Share Posted January 16, 2022 +1 for carina progress this is an awesome project that’s has done well and bloody well done! 2 Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted January 17, 2022 Author Popular Post Share Posted January 17, 2022 A few pics from drags, just in case your eyes havent been punished enough already 15 2 Quote Link to comment Share on other sites More sharing options...
shrike Posted January 17, 2022 Share Posted January 17, 2022 @Romanwhats the trap speed your getting? are the rear wheels the lightest/smallest option? Whats the max speed space savers are rated at and are they a lighter option 1 Quote Link to comment Share on other sites More sharing options...
Roman Posted January 17, 2022 Author Share Posted January 17, 2022 Fastest run was 100.5 mph I actually swapped the 13" steel wheels onto the back originally, for the drags. As they're lighter than the 14" wheels and R888R. But then figured I'm not too keen on being a bit light on rear end grip while I'm coming to terms with a potentially squishy/wobbly front end. Not a huge amount of weight difference, so would rather just change one variable at a time. 100% not keen on space savers or whatever! I'm looking for some 13" alloys in 4x100, so I can run a set of matching wheels and run these up the front. But need to find some wheels before I buy some, as this looks to be the hard part, finding some in 4x100 13"https://www.summitracing.com/parts/mnh-mss012 1 Quote Link to comment Share on other sites More sharing options...
Early jap nuter Posted January 17, 2022 Share Posted January 17, 2022 4 Quote Link to comment Share on other sites More sharing options...
Early jap nuter Posted January 17, 2022 Share Posted January 17, 2022 I know it’s over the top but how cool would it be 3 Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted January 23, 2022 Author Popular Post Share Posted January 23, 2022 I found out the issue with the wideband readings being wrong by heaps. Originally I bought the Spartan 3 wideband from 14point7, and this uses ONLY the LSU-ADV sensor. However canbus didnt work on it, so I got a replacement sent under warranty. The replacement controller was the new version - which can run the LSU-ADV sensor, or, the LSU-4.9 sensor. As they share the same plug. cool right? Except I wasnt aware that it could run both sensors - The replacement was set by default to the 4.9 sensor. D'oh! The calibrations are wildly different between them. The further you go from stoich the worse it gets. I adjusted the controller to the right sensor today, and instantly the lambda values that I was seeing went from 13.9ish down to 12.8ish which is what we tuned for with the tailpipe wideband on the dyno. So thats good, and I'm glad this mistake wasnt the other way around, or it would have run dangerously lean and probably blown itself up. As a side effect of this, all of my VE values are looking more sensible now. Getting a peak VE value of just under 98% at 7500rpm. Here's a visualization of estimated airflow through the motor, with the colour scale being throttle position. Notice how up until about 4250rpm, right down to nearly 50% throttle it's same airflow. Then at low rpm some part throttle areas are flowing more air than full throttle - thought this was weird, but then noticed that on the dyno runs we'd adjusted some full throttle VVTI values, but not reduced them at the part throttle segments too. So I reduced these down so it'll be max at full throttle instead. My next hope of getting anywhere is the nightspeed drag wars in about 2 weeks time. Will have to see if it can go ahead with current restrictions. Today was my birthday so I celebrated by going on some backroad hoons to Waihi Beach for a swim. Was glorious on both counts! 21 2 Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted January 23, 2022 Share Posted January 23, 2022 6 minutes ago, Roman said: backroad hoons to Waihi Beach man some of those roads we went on for coromandal nats were sweet! 2 Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted January 23, 2022 Share Posted January 23, 2022 Caught up on this thread again. Theres so much tech stuff/graphs etc that I only read it when my brain is running at full steam. Probably a different torque curve, but I've been 14.1 with 126hp in a car of a similar weight. (How much does yours weigh?) I'd estimate mine was around 840kgs excluding my fat arse. My quicker times saw a drop from 2.2 to 2.xxx seconds in the 60ft. (With sticky drag rubber, in fact once they were staged the motor couldnt spin them. Lol) My only suggestion is you need to fit an "I love lawn bowls" sticker. 6 Quote Link to comment Share on other sites More sharing options...
GuyWithAviators Posted January 23, 2022 Share Posted January 23, 2022 Carbon fibre picnic blanket on parcel tray and lightweight straw hat? 2 Quote Link to comment Share on other sites More sharing options...
Roman Posted January 23, 2022 Author Share Posted January 23, 2022 1 hour ago, RUNAMUCK said: Caught up on this thread again. Theres so much tech stuff/graphs etc that I only read it when my brain is running at full steam. Probably a different torque curve, but I've been 14.1 with 126hp in a car of a similar weight. (How much does yours weigh?) I'd estimate mine was around 840kgs excluding my fat arse. My quicker times saw a drop from 2.2 to 2.xxx seconds in the 60ft. (With sticky drag rubber, in fact once they were staged the motor couldnt spin them. Lol) My only suggestion is you need to fit an "I love lawn bowls" sticker. This is somewhere around the 800-820kg mark as drag raced (took passenger seat out) Yeah so there's something to be said for average horsepower that a peak number doesnt quite tell the story of. From dyno sheet my motor makes peak torque 5500rpm and peak hp 7600rpm. But it's worth revving it to 9k at the drags, because it means when I change gears it lands into more horsepower. If I changed gear at 7600rpm I'd be landing into 35hp less than what I land into with a 9k shift. Then it takes considerably longer to pull yourself up out of that horsepower hole. And I'd also have to shift into 4th before crossing the line. 4 Quote Link to comment Share on other sites More sharing options...
Spencer Posted January 23, 2022 Share Posted January 23, 2022 How many holes can we drill in this? 6 Quote Link to comment Share on other sites More sharing options...
mjrstar Posted January 23, 2022 Share Posted January 23, 2022 Bit of spam here, I just checked my 14.0 run in my civic vs your slower 14.0 some of the numbers are insanely close.. This is my stock b18cr with 3rd,4th,5th short gearset in a 990kg ek civic. 1 1 Quote Link to comment Share on other sites More sharing options...
tortron Posted January 23, 2022 Share Posted January 23, 2022 50 minutes ago, Spencer said: How many holes can we drill in this? Every single bolt cut to length, necked and drilled out is the least I expect 1 Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted January 24, 2022 Share Posted January 24, 2022 4 hours ago, tortron said: Every single bolt cut to length, necked and drilled out is the least I expect A guy on a forum I used to frequent reckoned you could get used titanium bolts from aircraft (helicopters maybe?) Where the bolts all had to be replaced every X number of hours. All cheap AF. 2 Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted January 24, 2022 Author Popular Post Share Posted January 24, 2022 It actually would be a bit of fun to make it a dedicated drag car. But then it's the same old problem, need to trailer it everywhere and it just sits around for 99.999% of its existence. Also 16 16 Quote Link to comment Share on other sites More sharing options...
tortron Posted January 24, 2022 Share Posted January 24, 2022 I almost had you You never had your gold card 1 Quote Link to comment Share on other sites More sharing options...
Stu Posted January 24, 2022 Share Posted January 24, 2022 I have some 15inch Wedssport TC's that weigh 2/3rds of 5/8ths of fuck all if you want to run them on the rear? These ones: 6 1 Quote Link to comment Share on other sites More sharing options...
shrike Posted January 28, 2022 Share Posted January 28, 2022 I wonder how much hp the exhaust will get you. Extra 20hp? Quote Link to comment Share on other sites More sharing options...
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