Dart 427 help

[Batmanntexas]

Originally Posted by acammer

LS7 lifters - yea, I would only run those for a 7000rpm deal. The Johnson recommendations they give are extremely, extremely conservative. The 2110, 2110R, 2116LSR, we've run all of those to over 8000rpm and over 500# open with excellent results. As far as the lift, that doesn't really add up either - is it a 1.7 or a 1.8 rocker? Again, we've seen a lot more than .630" lift with all of the above mentioned Johnson lifters, and again, not a problem. I have ST2116LSR's in my personal car, .650" lift, 500# open, 7700+rpm, all no worries.

I think you need to make sure you figure out what the weight of those severe duty valves are - as I recall those suckers are HEAVY and you're going to need quite a bit of valve-spring if you want to see some serious RPM. The cam in a 427 is really not all that aggressive, so maybe you really don't need to see much over 7000rpm to get most of the good out of that. Intake choice really depends on what you want to do with the cowl and hood. Stock stuff and maybe a BTR Trinity fit under the stock hood - the Hi-ram is kind of the standard option for more power if you're willing to cut stuff up.

@acammer - You are the man! As usual, you provide stellar information without the B.S. Much appreciated!!

OP - Sounds like it's going to be a great build! Keep us updated with pics and results!!

[WVracer]

Originally Posted by acammer

LS7 lifters - yea, I would only run those for a 7000rpm deal. The Johnson recommendations they give are extremely, extremely conservative. The 2110, 2110R, 2116LSR, we've run all of those to over 8000rpm and over 500# open with excellent results. As far as the lift, that doesn't really add up either - is it a 1.7 or a 1.8 rocker? Again, we've seen a lot more than .630" lift with all of the above mentioned Johnson lifters, and again, not a problem. I have ST2116LSR's in my personal car, .650" lift, 500# open, 7700+rpm, all no worries.

I think you need to make sure you figure out what the weight of those severe duty valves are - as I recall those suckers are HEAVY and you're going to need quite a bit of valve-spring if you want to see some serious RPM. The cam in a 427 is really not all that aggressive, so maybe you really don't need to see much over 7000rpm to get most of the good out of that. Intake choice really depends on what you want to do with the cowl and hood. Stock stuff and maybe a BTR Trinity fit under the stock hood - the Hi-ram is kind of the standard option for more power if you're willing to cut stuff up.

Yeah, I thought those figures that Tick recommended seemed really low. Thats why I told him to make sure he verified because those didn't seem right. Good to know though that we got some reliable information on them. Thanks a lot!

[57jettruck]

Well guys it’s been a long time. Life got in the way and the new power plant for the Camaro took a back seat for a while but I’m now back in the thick of things. I’m waiting on my tuner to get back with me but they are so busy so thought I would post on here. I have assembled the top end and am now looking for suggestion on my intake and injector choices. I have a factory ls3 manifold with stock injectors sitting in the shop but let’s get everyone spun up on where I’m at and why.

I don’t have the coin currently for the turbos so I’m looking into what makes the most sense and not waste money. I’m currently waiting on the factor GM ls3 rockers with CHE trunion upgrade from tsp and already have my pushrods. Yes I already measured for proper length with a factory set of rockers. With that said. I don’t know whether or not to use the factory manifold or spend the money on a BTR. The car will stay NA for a bit while breaking in the engine and new clutch which I’m thinking of ordering the monster triple disc. Any other inputs there?

Injector wise I don’t want to waste money so was wondering should I purchase the injector size I need or my end horsepower goal with the turbos along with the BTR manifold and a aftermarket throttle body? Or just use the factory stuff for now? I don’t know that the stock injectors are rated for e85 so I was trying to keep from spending money on injectors twice.

Thanks for the help in advance and I’ll try and post some pics.

[57jettruck]

[gtstorey]

Using E85 turbo injectors with gasoline NA could be tricky. You might get by with it with good injectors with full injector data in GM format. I wouldn’t do anything about injectors without consulting your tuner since he is the one that will have to make them work. One of the most common problems on HPT forum is to big an injector and can’t get them to hot/cold start or trouble with idle.

[joshnmn]

If you are putting in a turbo fuel system now and have already done the e85 swap then new injectors are a must. Luckily they can be had for a decent price if you don’t wanna plop down the cash for a big set.

Are you set on the btr intake? I love the look, but haven’t seen anything good about it, especially N/A. I didn’t read through here and don’t know your goals, but the factory intake is hard to beat on the street. You can pickup 10-20 peak hp with others, but that’s at a sacrifice of low end power. Not many intakes average better numbers over the stocker.

[FasNuf]

Originally Posted by 57jettruck

Attachment 1155980

I have to comment to get thread notifications and since I'm here just want to say I love the shop. Looks like an engine assembly lab! Nice setup.

[57jettruck]

Thanks for all the input guys, I’ve been leaning towards reusing the stock manifold just bc I don’t see really large gains or other plus sides to an aftermarket intake that will fit under the stock hood and retain the wipers. Maybe down the road at some point I will spend the money on a really nice intake. So with staying with the stock intake I’m just waiting to talk to my tuner on injector size as I would stay NA until after break in and turbo parts to be in route. I was looking into FIC clinic 1650 or 2150 for my end power goals as I already have and will be installing the AGP triple pump with flex fuel sensor rated for e85. Of course waiting to hear from my tuner to see if he wants me to run a smaller size while NA. I’m building everything overkill as I don’t want to lean on anything to its max I want this combo to live happily.

How do yall feel about the monster triple disc clutch?

[gtstorey]

What are you using this for? Drag Only? Daily driver? Occasionally driven toy?

[57jettruck]

An in between daily driver and occasionally driven toy. I travel a lot for work so sometimes I’m home for a 1-2 weeks at a time other times it’s only a couple days and stints where I’m gone for 4-8 weeks. Longest time home is December - February.

[acutron42]

Originally Posted by 57jettruck

An in between daily driver and occasionally driven toy. I travel a lot for work so sometimes I’m home for a 1-2 weeks at a time other times it’s only a couple days and stints where I’m gone for 4-8 weeks. Longest time home is December - February.

In this case, maybe consider keeping it on pump gas.

[57jettruck]

Acutron42, can you shed some light on why? I’m assuming the possible lengthy wait times having E85 on board?

[acutron42]

Well, If you were racing every weekend or so I get it. Maybe someone else can chime in on the E85 sitting long term. For a daily with some occasional fun, maybe try out what you have on hand with a good 93 tune & save up money for the big mods.

[CamaroCracka]

I run E85 and it can go a few weeks between drives. My mud truck runs it too and it goes longer than that between trips.