Guest Anonymous Posted September 24, 2002 Share Posted September 24, 2002 I am going to start building up my 350 4bolt engine for my Datsun. I'm going flattop pistons, 5.7 rods, 383 stroker crank, ported L98 heads rebuilt, 1.6 roller rockers, just basic stuff. Haven't choosen a cam yet, waiting to decide on intake before I do so. I can't figure out what I want to do though. Single 4 barrel, fuel injection, all these ram jet systems, I'm confused. I would bet that alot of you guys would want to shoot me for saying this, but I'm considering an older camaro/vette Crossfire injection system. I'm pretty good at building them up for performance engines, so I'm thinking I like that idea perhaps. I want fuel injection, but can't afford very much. I have experience with crossfire so I know how much I'll get into spending there. What do you guys think. I want to keep it cheap, this is just going to be a basic performance engine, nothing fancy, just doing it to say I had a 383 Datsun pretty much. I want to spend less then $1,000 on the engine, and then injection can be added on top of that cost, but I will not pay the $1,500 or whatever for most aftermarket systems. I'm thinking $500 MAX. What would you reccomend and what are the costs of some of these systems? Thanks! Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted September 24, 2002 Share Posted September 24, 2002 if you want to get laughed off the site I can let you propose those ideas to the guys that drive those cars, they might laugh themselfs sick though. look here,this is the inside of the stock crossfire intake , this is the edelbrock SY1 intake they are all wanting to swap too because the stock intake runs out of air at 4000rpm as its designed to work at 1000-3000rpm the stock intake has a very hard time getting to 360hp. the unported SY1 can suport 475-500hp just add an 850 holley btw the correct matching cam for the SY1 is, http://dab7.cranecams.com/SpecCard/DisplayCatalogCard.asp?PN=114681&B1=Display+Card heres one,with the top on. they are out of production but are available on EBAY for $350-$450 depending on condithion this style (like a super victor by edelbrock also work ok. now keep in mind these are intakes designed for max hp and not truely ideal for a daily driver (performance is less than ideal below 3500rpm) Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 24, 2002 Share Posted September 24, 2002 Theres lots of things you can do to the crossfire system to make it support more horsepower. Larger injectors, pod spacers, boring out, extream intake porting, removeal of EGR passage inside the manifold. I built a Crossfire system to run on a vette with a 377ci engine and the car ran high 11's. I did everything to the intake except the porting and polishing work...I think Crossfire is really underrated, with proper work and modification they CAN be good systems, most are so old now that they don't work worth crap, but they can be fixed up for a reasonable price... Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted September 25, 2002 Share Posted September 25, 2002 the main point on modifying the crossfire intake is why bother, youll spend more money, time and effort and get far less results than youll get by swapping to a SY1 with a modifyed lid or a STEATH RAM. if you got into the 11s with a modifyed cross ram intake think of how much faster you would have been with a modifyed SY1 or steath ram that flows better to start than a fully modifyed crossram ever would. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 25, 2002 Share Posted September 25, 2002 Well yeah, I do fully understand your point. My only reasoning behind wanting Crossfire is because 1)This is a daily street driven/street raced vehical, will probally only get it on a track a couple times a year. 2)Its basic form of fuel injection, which I want for gas milage, durability, and really cold Nebraska morning reasons. And 3)I'm familier with it, I know how to work on it since I'v owned it in the past, and I can do pretty descent in modding them out for performance. I still dont know what I'm going to do yet, if I can find a Crossfire setup reasonably cheap then I'll purchase it and mod it out, if I can't, then I'll go with a descent setup for some more lower end power since this is a daily driver and street vehical. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 25, 2002 Share Posted September 25, 2002 Why not a single thottlebody TBI on a aftermarket manifold like Grumpy showed above? It'll put out more HP, be as easy to hook up and the parts can be had for easily as cheap as the crossfire. It'd require just an adapter plate to mount the throttlebody. The big concern is flow, without heavily moving metal and rewelding/jb welding a bunch on the ports. (anyone seen the side view of the ports on a crossfire injection manifold?) Heres a page from where that photo was taken, he reworked the crap out of one: http://www.newcovenant.com/firebird/induction.htm Just some food for thought, if you have your heart set on one, dare to be different, but considering a single TBI system will do what you want without all the work, I can't see the attraction outside of hey look its got a crossfire injection. *shrug* Good luck with your project no matter what you end up doing. Regards, Lone Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted September 25, 2002 Share Posted September 25, 2002 LoneInAZ after a huge amount of custom cutting and welding he got the crossfire intake to flow increase from 150cfm stock to 200cfm after the mods now as Ive said before, the formula for potential hp from the airflow is (airflow x .257 x #cylinders =hp) the stock crosfire engine makes about 210hp, with that extensive mods hes POTENTIALLY up to 411hp(his own chart shows less hp) now any performer RPM intake flows enough air to make 420hp for a lot less work and money, WHY BOTHER... the steath ram, SY-1 or super vic intakes all flow enough air UNTOUCHED,OUT OF THE BOX, STOCK, to make 475-600hp with little or no effort and more ported, like I said the crossfire intakes a waste of time and money Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 25, 2002 Share Posted September 25, 2002 Yes a single throttle body is a consideration. Money is the only thing limiting me here. If I can find one cheaply, and put it on that first manifold you posted, I would be smileing all the way to the track. I will consider a single TB setup also, I just figured dual TB's would be better, but you point out a good point in the flow of the manifold. I'm kinda wondering how hard it would be to make a custom plate for the top of that first edelbrock manifold to adapt the dual crossfire TB's to it? I know quite a few Camaro guys have successfully made custom plates to put single and dual carbs on the crossfire manifold, I'm sure it would be about the same amount of work doing just the oppisite...I'm going to look into that also... Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted September 26, 2002 Share Posted September 26, 2002 heres what a custom top that fits the dual crossfire throttle bodys looks like heres the SY1 base that far out flows a stock intake looks like again Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 26, 2002 Share Posted September 26, 2002 Sweet, I know what I'm going with now then...Do you know where I could purchase a top like that? Thanks Quote Link to comment Share on other sites More sharing options...
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